def kst_oscillator(close_arr, r1, r2, r3, r4, n1, n2, n3, n4):
"""Calculate KST Oscillator for given data.
:param close_arr: close price of the bar, expect series from cudf
:param r1: r1 time steps
:param r2: r2 time steps
:param r3: r3 time steps
:param r4: r4 time steps
:param n1: n1 time steps
:param n2: n2 time steps
:param n3: n3 time steps
:param n4: n4 time steps
:return: KST Oscillator in cudf.Series
"""
M1 = diff(close_arr, r1 - 1)
N1 = shift(close_arr, r1 - 1)
M2 = diff(close_arr, r2 - 1)
N2 = shift(close_arr, r2 - 1)
M3 = diff(close_arr, r3 - 1)
N3 = shift(close_arr, r3 - 1)
M4 = diff(close_arr, r4 - 1)
N4 = shift(close_arr, r4 - 1)
term1 = Rolling(n1, division(M1, N1)).sum()
term2 = scale(Rolling(n2, division(M2, N2)).sum(), 2.0)
term3 = scale(Rolling(n3, division(M3, N3)).sum(), 3.0)
term4 = scale(Rolling(n4, division(M4, N4)).sum(), 4.0)
KST = summation(summation(summation(term1, term2), term3), term4)
return cudf.Series(KST)
def port_average_directional_movement_index(asset_indicator, high_arr, low_arr,
close_arr, n, n_ADX):
"""Calculate the port Average Directional Movement Index for given data.
:param asset_indicator: the indicator of beginning of the stock
:param high_arr: high price of the bar, expect series from cudf
:param low_arr: low price of the bar, expect series from cudf
:param close_arr: close price of the bar, expect series from cudf
:param n: time steps to do EWM average
:param n_ADX: time steps to do EWM average of ADX
:return: Average Directional Movement Index in cudf.Series
"""
UpI, DoI = upDownMove(high_arr.data.to_gpu_array(),
low_arr.data.to_gpu_array())
tr = port_true_range(asset_indicator.to_gpu_array(),
high_arr.data.to_gpu_array(),
low_arr.data.to_gpu_array(),
close_arr.data.to_gpu_array())
ATR = PEwm(n, tr, asset_indicator).mean()
PosDI = division(PEwm(n, UpI, asset_indicator).mean(), ATR)
NegDI = division(PEwm(n, DoI, asset_indicator).mean(), ATR)
NORM = division(abs_arr(substract(PosDI, NegDI)), summation(PosDI, NegDI))
port_mask_nan(asset_indicator.data.to_gpu_array(), NORM, -1, 0)
ADX = cudf.Series(PEwm(n_ADX, NORM, asset_indicator).mean())
return ADX
def coppock_curve(close_arr, n):
"""Calculate Coppock Curve for given data.
:param close_arr: close price of the bar, expect series from cudf
:param n: time steps
:return: Coppock Curve in cudf.Series
"""
M = diff(close_arr, int(n * 11 / 10) - 1)
N = shift(close_arr, int(n * 11 / 10) - 1)
ROC1 = division(M, N)
M = diff(close_arr, int(n * 14 / 10) - 1)
N = shift(close_arr, int(n * 14 / 10) - 1)
ROC2 = division(M, N)
Copp = Ewm(n, summation(ROC1, ROC2)).mean()
return cudf.Series(Copp)
def port_vortex_indicator(asset_indicator, high_arr, low_arr, close_arr, n):
"""Calculate the port Vortex Indicator for given data.
Vortex Indicator described here:
http://www.vortexindicator.com/VFX_VORTEX.PDF
:param asset_indicator: the indicator of beginning of the stock
:param high_arr: high price of the bar, expect series from cudf
:param low_arr: low price of the bar, expect series from cudf
:param close_arr: close price of the bar, expect series from cudf
:param n: time steps to do EWM average
:return: Vortex Indicator in cudf.Series
"""
TR = port_true_range(asset_indicator.to_gpu_array(),
high_arr.data.to_gpu_array(),
low_arr.data.to_gpu_array(),
close_arr.data.to_gpu_array())
VM = port_lowhigh_diff(asset_indicator.to_gpu_array(),
high_arr.data.to_gpu_array(),
low_arr.data.to_gpu_array())
VI = division(Rolling(n, VM).sum(), Rolling(n, TR).sum())
port_mask_nan(asset_indicator.data.to_gpu_array(), VI, 0, n - 1)
return cudf.Series(VI)
def ultimate_oscillator(high_arr, low_arr, close_arr):
"""Calculate Ultimate Oscillator for given data.
:param high_arr: high price of the bar, expect series from cudf
:param low_arr: low price of the bar, expect series from cudf
:param close_arr: close price of the bar, expect series from cudf
:return: Ultimate Oscillator in cudf.Series
"""
TR_l, BP_l = ultimate_osc(high_arr.to_gpu_array(), low_arr.to_gpu_array(),
close_arr.to_gpu_array())
term1 = division(scale(Rolling(7, BP_l).sum(), 4.0),
Rolling(7, TR_l).sum())
term2 = division(scale(Rolling(14, BP_l).sum(), 2.0),
Rolling(14, TR_l).sum())
term3 = division(Rolling(28, BP_l).sum(), Rolling(28, TR_l).sum())
UltO = summation(summation(term1, term2), term3)
return cudf.Series(UltO, nan_as_null=False)
def bollinger_bands(close_arr, n):
"""Calculate the Bollinger Bands.
See https://www.investopedia.com/terms/b/bollingerbands.asp for details
:param close_arr: close price of the bar, expect series from cudf
:param n: time steps
:return: b1 b2
"""
MA = Rolling(n, close_arr).mean()
MSD = Rolling(n, close_arr).std()
close_arr_gpu = numba.cuda.device_array_like(close_arr.data.to_gpu_array())
close_arr_gpu[:] = close_arr.data.to_gpu_array()[:]
close_arr_gpu[0:n - 1] = math.nan
MSD_4 = scale(MSD, 4.0)
b1 = division(MSD_4, MA)
b2 = division(summation(substract(close_arr_gpu, MA), scale(MSD, 2.0)),
MSD_4)
out = collections.namedtuple('Bollinger', 'b1 b2')
return out(b1=cudf.Series(b1), b2=cudf.Series(b2))
def rate_of_change(close_arr, n):
""" Calculate the rate of return
:param close_arr: close price of the bar, expect series from cudf
:param n: time steps
:return: rate of change in cu.Series
"""
M = diff(close_arr, n - 1)
N = shift(close_arr, n - 1)
return cudf.Series(division(M, N))
def port_kst_oscillator(asset_indicator, close_arr, r1, r2, r3, r4, n1, n2, n3,
n4):
"""Calculate port KST Oscillator for given data.
:param asset_indicator: the indicator of beginning of the stock
:param close_arr: close price of the bar, expect series from cudf
:param r1: r1 time steps
:param r2: r2 time steps
:param r3: r3 time steps
:param r4: r4 time steps
:param n1: n1 time steps
:param n2: n2 time steps
:param n3: n3 time steps
:param n4: n4 time steps
:return: KST Oscillator in cudf.Series
"""
M1 = diff(close_arr, r1 - 1)
N1 = shift(close_arr, r1 - 1)
port_mask_nan(asset_indicator.data.to_gpu_array(), M1, 0, r1 - 1)
port_mask_nan(asset_indicator.data.to_gpu_array(), N1, 0, r1 - 1)
M2 = diff(close_arr, r2 - 1)
N2 = shift(close_arr, r2 - 1)
port_mask_nan(asset_indicator.data.to_gpu_array(), M2, 0, r2 - 1)
port_mask_nan(asset_indicator.data.to_gpu_array(), N2, 0, r2 - 1)
M3 = diff(close_arr, r3 - 1)
N3 = shift(close_arr, r3 - 1)
port_mask_nan(asset_indicator.data.to_gpu_array(), M3, 0, r3 - 1)
port_mask_nan(asset_indicator.data.to_gpu_array(), N3, 0, r3 - 1)
M4 = diff(close_arr, r4 - 1)
N4 = shift(close_arr, r4 - 1)
port_mask_nan(asset_indicator.data.to_gpu_array(), M4, 0, r4 - 1)
port_mask_nan(asset_indicator.data.to_gpu_array(), N4, 0, r4 - 1)
term1 = Rolling(n1, division(M1, N1)).sum()
port_mask_nan(asset_indicator.data.to_gpu_array(), term1, 0, n1 - 1)
term2 = scale(Rolling(n2, division(M2, N2)).sum(), 2.0)
port_mask_nan(asset_indicator.data.to_gpu_array(), term2, 0, n2 - 1)
term3 = scale(Rolling(n3, division(M3, N3)).sum(), 3.0)
port_mask_nan(asset_indicator.data.to_gpu_array(), term3, 0, n3 - 1)
term4 = scale(Rolling(n4, division(M4, N4)).sum(), 4.0)
port_mask_nan(asset_indicator.data.to_gpu_array(), term4, 0, n4 - 1)
KST = summation(summation(summation(term1, term2), term3), term4)
return cudf.Series(KST)
def port_coppock_curve(asset_indicator, close_arr, n):
"""Calculate port Coppock Curve for given data.
:param asset_indicator: the indicator of beginning of the stock
:param close_arr: close price of the bar, expect series from cudf
:param n: time steps
:return: Coppock Curve in cudf.Series
"""
M = diff(close_arr, int(n * 11 / 10) - 1)
N = shift(close_arr, int(n * 11 / 10) - 1)
port_mask_nan(asset_indicator.to_gpu_array(), M, 0, int(n * 11 / 10) - 1)
port_mask_nan(asset_indicator.to_gpu_array(), N, 0, int(n * 11 / 10) - 1)
ROC1 = division(M, N)
M = diff(close_arr, int(n * 14 / 10) - 1)
N = shift(close_arr, int(n * 14 / 10) - 1)
port_mask_nan(asset_indicator.to_gpu_array(), M, 0, int(n * 14 / 10) - 1)
port_mask_nan(asset_indicator.to_gpu_array(), N, 0, int(n * 14 / 10) - 1)
ROC2 = division(M, N)
Copp = PEwm(n, summation(ROC1, ROC2), asset_indicator).mean()
return cudf.Series(Copp, nan_as_null=False)
def average_directional_movement_index(high_arr, low_arr, close_arr, n, n_ADX):
"""Calculate the Average Directional Movement Index for given data.
:param high_arr: high price of the bar, expect series from cudf
:param low_arr: low price of the bar, expect series from cudf
:param close_arr: close price of the bar, expect series from cudf
:param n: time steps to do EWM average
:param n_ADX: time steps to do EWM average of ADX
:return: Average Directional Movement Index in cudf.Series
"""
UpI, DoI = upDownMove(high_arr.to_gpu_array(), low_arr.to_gpu_array())
last_ele = len(high_arr) - 1
tr = true_range(high_arr.to_gpu_array(), low_arr.to_gpu_array(),
close_arr.to_gpu_array())
ATR = Ewm(n, tr).mean()
PosDI = division(Ewm(n, UpI).mean(), ATR)
NegDI = division(Ewm(n, DoI).mean(), ATR)
NORM = division(abs_arr(substract(PosDI, NegDI)), summation(PosDI, NegDI))
NORM[last_ele] = math.nan
ADX = cudf.Series(Ewm(n_ADX, NORM).mean(), nan_as_null=False)
return ADX
def port_ultimate_oscillator(asset_indicator, high_arr, low_arr, close_arr):
"""Calculate port Ultimate Oscillator for given data.
:param asset_indicator: the indicator of beginning of the stock
:param high_arr: high price of the bar, expect series from cudf
:param low_arr: low price of the bar, expect series from cudf
:param close_arr: close price of the bar, expect series from cudf
:return: Ultimate Oscillator in cudf.Series
"""
TR_l, BP_l = port_ultimate_osc(asset_indicator.data.to_gpu_array(),
high_arr.data.to_gpu_array(),
low_arr.data.to_gpu_array(),
close_arr.data.to_gpu_array())
term1 = division(scale(Rolling(7, BP_l).sum(), 4.0),
Rolling(7, TR_l).sum())
term2 = division(scale(Rolling(14, BP_l).sum(), 2.0),
Rolling(14, TR_l).sum())
term3 = division(Rolling(28, BP_l).sum(), Rolling(28, TR_l).sum())
port_mask_nan(asset_indicator.data.to_gpu_array(), term1, 0, 6)
port_mask_nan(asset_indicator.data.to_gpu_array(), term2, 0, 13)
port_mask_nan(asset_indicator.data.to_gpu_array(), term3, 0, 27)
UltO = summation(summation(term1, term2), term3)
return cudf.Series(UltO)
def port_bollinger_bands(asset_indicator, close_arr, n):
"""Calculate the port Bollinger Bands.
See https://www.investopedia.com/terms/b/bollingerbands.asp for details
:param asset_indicator: the indicator of beginning of the stock
:param close_arr: close price of the bar, expect series from cudf
:param n: time steps
:return: b1 b2
"""
MA = Rolling(n, close_arr).mean()
port_mask_nan(asset_indicator.to_gpu_array(), MA, 0, n - 1)
MSD = Rolling(n, close_arr).std()
port_mask_nan(asset_indicator.to_gpu_array(), MSD, 0, n - 1)
close_arr_gpu = numba.cuda.device_array_like(close_arr.to_gpu_array())
close_arr_gpu[:] = close_arr.to_gpu_array()[:]
close_arr_gpu[0:n - 1] = math.nan
MSD_4 = scale(MSD, 4.0)
b1 = division(MSD_4, MA)
b2 = division(summation(substract(close_arr_gpu, MA), scale(MSD, 2.0)),
MSD_4)
out = collections.namedtuple('Bollinger', 'b1 b2')
return out(b1=cudf.Series(b1, nan_as_null=False),
b2=cudf.Series(b2, nan_as_null=False))
def mass_index(high_arr, low_arr, n1, n2):
"""Calculate the Mass Index for given data.
:param high_arr: high price of the bar, expect series from cudf
:param low_arr: low price of the bar, expect series from cudf
:param n1: n1 time steps
:param n1: n2 time steps
:return: Mass Index in cudf.Series
"""
Range = high_arr - low_arr
EX1 = Ewm(n1, Range).mean()
EX2 = Ewm(n1, EX1).mean()
Mass = division(EX1, EX2)
MassI = Rolling(n2, Mass).sum()
return cudf.Series(MassI)
def commodity_channel_index(high_arr, low_arr, close_arr, n):
"""Calculate Commodity Channel Index for given data.
:param high_arr: high price of the bar, expect series from cudf
:param low_arr: low price of the bar, expect series from cudf
:param close_arr: close price of the bar, expect series from cudf
:param n: time steps
:return: Commodity Channel Index in cudf.Series
"""
PP = average_price(high_arr.to_gpu_array(), low_arr.to_gpu_array(),
close_arr.to_gpu_array())
M = Rolling(n, PP).mean()
N = Rolling(n, PP).std()
CCI = division(substract(PP, M), N)
return cudf.Series(CCI, nan_as_null=False)
def accumulation_distribution(high_arr, low_arr, close_arr, vol_arr, n):
"""Calculate Accumulation/Distribution for given data.
:param high_arr: high price of the bar, expect series from cudf
:param low_arr: low price of the bar, expect series from cudf
:param close_arr: close price of the bar, expect series from cudf
:param vol_arr: volume of the bar, expect series from cudf
:param n: time steps
:return: Accumulation/Distribution in cudf.Series
"""
ad = (2.0 * close_arr - high_arr - low_arr) / (high_arr -
low_arr) * vol_arr
M = diff(ad, n - 1)
N = shift(ad, n - 1)
return cudf.Series(division(M, N))
def true_strength_index(close_arr, r, s):
"""Calculate True Strength Index (TSI) for given data.
:param close_arr: close price of the bar, expect series from cudf
:param r: r time steps
:param s: s time steps
:return: True Strength Index in cudf.Series
"""
M = diff(close_arr, 1)
aM = abs_arr(M)
EMA1 = Ewm(r, M).mean()
aEMA1 = Ewm(r, aM).mean()
EMA2 = Ewm(s, EMA1).mean()
aEMA2 = Ewm(s, aEMA1).mean()
TSI = division(EMA2, aEMA2)
return cudf.Series(TSI)
def port_rate_of_change(asset_indicator, close_arr, n):
""" Calculate the port rate of return
:param asset_indicator: the indicator of beginning of the stock
:param close_arr: close price of the bar, expect series from cudf
:param n: time steps
:return: rate of change in cu.Series
"""
M = diff(close_arr, n - 1)
N = shift(close_arr, n - 1)
out = division(M, N)
if n - 1 >= 0:
port_mask_nan(asset_indicator.data.to_gpu_array(), out, 0, n - 1)
else:
port_mask_nan(asset_indicator.data.to_gpu_array(), out, n - 1, 0)
return cudf.Series(out)
def port_mass_index(asset_indicator, high_arr, low_arr, n1, n2):
"""Calculate the port Mass Index for given data.
:param asset_indicator: the indicator of beginning of the stock
:param high_arr: high price of the bar, expect series from cudf
:param low_arr: low price of the bar, expect series from cudf
:param n1: n1 time steps
:param n1: n2 time steps
:return: Mass Index in cudf.Series
"""
Range = high_arr - low_arr
EX1 = PEwm(n1, Range, asset_indicator).mean()
EX2 = PEwm(n1, EX1, asset_indicator).mean()
Mass = division(EX1, EX2)
MassI = Rolling(n2, Mass).sum()
port_mask_nan(asset_indicator.data.to_gpu_array(), MassI, 0, n2 - 1)
return cudf.Series(MassI)
def relative_strength_index(high_arr, low_arr, n):
"""Calculate Relative Strength Index(RSI) for given data.
:param high_arr: high price of the bar, expect series from cudf
:param low_arr: low price of the bar, expect series from cudf
:param n: time steps to do EWM average
:return: Relative Strength Index in cudf.Series
"""
UpI, DoI = upDownMove(high_arr.to_gpu_array(), low_arr.to_gpu_array())
UpI_s = shift(UpI, 1)
UpI_s[0] = 0
DoI_s = shift(DoI, 1)
DoI_s[0] = 0
PosDI = Ewm(n, UpI_s).mean()
NegDI = Ewm(n, DoI_s).mean()
RSI = division(PosDI, summation(PosDI, NegDI))
return cudf.Series(RSI, nan_as_null=False)
def money_flow_index(high_arr, low_arr, close_arr, volume_arr, n):
"""Calculate Money Flow Index and Ratio for given data.
:param high_arr: high price of the bar, expect series from cudf
:param low_arr: low price of the bar, expect series from cudf
:param close_arr: close price of the bar, expect series from cudf
:param volume_arr: volume the bar, expect series from cudf
:param n: time steps
:return: Money Flow Index in cudf.Series
"""
PP = average_price(high_arr.to_gpu_array(), low_arr.to_gpu_array(),
close_arr.to_gpu_array())
PosMF = money_flow(PP, volume_arr.to_gpu_array())
MFR = division(PosMF, (multiply(PP, volume_arr.to_gpu_array()))) # TotMF
MFI = Rolling(n, MFR).mean()
return cudf.Series(MFI, nan_as_null=False)
def port_true_strength_index(asset_indicator, close_arr, r, s):
"""Calculate port True Strength Index (TSI) for given data.
:param asset_indicator: the indicator of beginning of the stock
:param close_arr: close price of the bar, expect series from cudf
:param r: r time steps
:param s: s time steps
:return: True Strength Index in cudf.Series
"""
M = diff(close_arr, 1)
port_mask_nan(asset_indicator.data.to_gpu_array(), M, 0, 1)
aM = abs_arr(M)
EMA1 = PEwm(r, M, asset_indicator).mean()
aEMA1 = PEwm(r, aM, asset_indicator).mean()
EMA2 = PEwm(s, EMA1, asset_indicator).mean()
aEMA2 = PEwm(s, aEMA1, asset_indicator).mean()
TSI = division(EMA2, aEMA2)
return cudf.Series(TSI)
def ease_of_movement(high_arr, low_arr, volume_arr, n):
"""Calculate Ease of Movement for given data.
:param high_arr: high price of the bar, expect series from cudf
:param low_arr: low price of the bar, expect series from cudf
:param volume_arr: volume the bar, expect series from cudf
:param n: time steps
:return: Ease of Movement in cudf.Series
"""
high_arr_gpu = high_arr.data.to_gpu_array()
low_arr_gpu = low_arr.data.to_gpu_array()
EoM = division(
multiply(summation(diff(high_arr_gpu, 1), diff(low_arr_gpu, 1)),
substract(high_arr_gpu, low_arr_gpu)),
scale(volume_arr.data.to_gpu_array(), 2.0))
Eom_ma = Rolling(n, EoM).mean()
return cudf.Series(Eom_ma)
def vortex_indicator(high_arr, low_arr, close_arr, n):
"""Calculate the Vortex Indicator for given data.
Vortex Indicator described here:
http://www.vortexindicator.com/VFX_VORTEX.PDF
:param high_arr: high price of the bar, expect series from cudf
:param low_arr: low price of the bar, expect series from cudf
:param close_arr: close price of the bar, expect series from cudf
:param n: time steps to do EWM average
:return: Vortex Indicator in cudf.Series
"""
TR = true_range(high_arr.to_gpu_array(), low_arr.to_gpu_array(),
close_arr.to_gpu_array())
VM = lowhigh_diff(high_arr.to_gpu_array(), low_arr.to_gpu_array())
VI = division(Rolling(n, VM).sum(), Rolling(n, TR).sum())
return cudf.Series(VI, nan_as_null=False)
def port_accumulation_distribution(asset_indicator, high_arr, low_arr,
close_arr, vol_arr, n):
"""Calculate port Accumulation/Distribution for given data.
:param asset_indicator: the indicator of beginning of the stock
:param high_arr: high price of the bar, expect series from cudf
:param low_arr: low price of the bar, expect series from cudf
:param close_arr: close price of the bar, expect series from cudf
:param vol_arr: volume of the bar, expect series from cudf
:param n: time steps
:return: Accumulation/Distribution in cudf.Series
"""
ad = (2.0 * close_arr - high_arr - low_arr) / (high_arr -
low_arr) * vol_arr
M = diff(ad, n - 1)
port_mask_nan(asset_indicator.data.to_gpu_array(), M, 0, n - 1)
N = shift(ad, n - 1)
port_mask_nan(asset_indicator.data.to_gpu_array(), N, 0, n - 1)
return cudf.Series(division(M, N))
def port_commodity_channel_index(asset_indicator, high_arr, low_arr, close_arr,
n):
"""Calculate port Commodity Channel Index for given data.
:param asset_indicator: the indicator of beginning of the stock
:param high_arr: high price of the bar, expect series from cudf
:param low_arr: low price of the bar, expect series from cudf
:param close_arr: close price of the bar, expect series from cudf
:param n: time steps
:return: Commodity Channel Index in cudf.Series
"""
PP = average_price(high_arr.to_gpu_array(), low_arr.to_gpu_array(),
close_arr.to_gpu_array())
M = Rolling(n, PP).mean()
port_mask_nan(asset_indicator.to_gpu_array(), M, 0, n - 1)
N = Rolling(n, PP).std()
port_mask_nan(asset_indicator.to_gpu_array(), N, 0, n - 1)
CCI = division(substract(PP, M), N)
return cudf.Series(CCI, nan_as_null=False)
def port_relative_strength_index(asset_indicator, high_arr, low_arr, n):
"""Calculate Relative Strength Index(RSI) for given data.
:param high_arr: high price of the bar, expect series from cudf
:param low_arr: low price of the bar, expect series from cudf
:param n: time steps to do EWM average
:return: Relative Strength Index in cudf.Series
"""
UpI, DoI = upDownMove(high_arr.data.to_gpu_array(),
low_arr.data.to_gpu_array())
UpI_s = shift(UpI, 1)
UpI_s[0] = 0
UpI_s = cudf.Series(UpI_s) * (1.0 - asset_indicator)
DoI_s = shift(DoI, 1)
DoI_s[0] = 0
DoI_s = cudf.Series(DoI_s) * (1.0 - asset_indicator)
PosDI = PEwm(n, UpI_s, asset_indicator).mean()
NegDI = PEwm(n, DoI_s, asset_indicator).mean()
RSI = division(PosDI, summation(PosDI, NegDI))
return cudf.Series(RSI)
def port_money_flow_index(asset_indicator, high_arr, low_arr, close_arr,
volume_arr, n):
"""Calculate port Money Flow Index and Ratio for given data.
:param asset_indicator: the indicator of beginning of the stock
:param high_arr: high price of the bar, expect series from cudf
:param low_arr: low price of the bar, expect series from cudf
:param close_arr: close price of the bar, expect series from cudf
:param volume_arr: volume the bar, expect series from cudf
:param n: time steps
:return: Money Flow Index in cudf.Series
"""
PP = average_price(high_arr.to_gpu_array(), low_arr.to_gpu_array(),
close_arr.to_gpu_array())
PosMF = port_money_flow(asset_indicator.to_gpu_array(), PP,
volume_arr.to_gpu_array())
MFR = division(PosMF, (multiply(PP, volume_arr.to_gpu_array()))) # TotMF
MFI = Rolling(n, MFR).mean()
port_mask_nan(asset_indicator.to_gpu_array(), MFI, 0, n - 1)
return cudf.Series(MFI, nan_as_null=False)
def port_ease_of_movement(asset_indicator, high_arr, low_arr, volume_arr, n):
"""Calculate port Ease of Movement for given data.
:param asset_indicator: the indicator of beginning of the stock
:param high_arr: high price of the bar, expect series from cudf
:param low_arr: low price of the bar, expect series from cudf
:param volume_arr: volume the bar, expect series from cudf
:param n: time steps
:return: Ease of Movement in cudf.Series
"""
high_arr_gpu = high_arr.data.to_gpu_array()
low_arr_gpu = low_arr.data.to_gpu_array()
EoM = division(
multiply(summation(diff(high_arr_gpu, 1), diff(low_arr_gpu, 1)),
substract(high_arr_gpu, low_arr_gpu)),
scale(volume_arr.data.to_gpu_array(), 2.0))
port_mask_nan(asset_indicator.data.to_gpu_array(), EoM, 0, 1)
Eom_ma = Rolling(n, EoM).mean()
port_mask_nan(asset_indicator.data.to_gpu_array(), Eom_ma, 0, n - 1)
return cudf.Series(Eom_ma)
