def TwoAveragesEx(
average1=None, # mathutils.ewma(alpha = 0.15),
average2=None, # mathutils.ewma(alpha = 0.015),
threshold=0,
orderFactory=order.MarketFactory,
creationIntervalDistr=mathutils.rnd.expovariate(1.0),
volumeDistr=mathutils.rnd.expovariate(1.0),
):
if average1 is None:
average1 = mathutils.ewma(alpha=0.15)
if average2 is None:
average2 = mathutils.ewma(alpha=0.015)
return defs(
Generic(
orderFactory=orderFactory,
volumeFunc=volumeDistr,
eventGen=scheduler.Timer(creationIntervalDistr),
sideFunc=SignalSide(
mathutils.sub(observable.Fold(_.price, average1), observable.Fold(_.price, average2)), threshold
),
),
{"price": observable.Price(orderbook.OfTrader())},
)
def LiquidityProviderEx (orderFactory = order.LimitFactory,
defaultValue = 100.,
creationIntervalDistr = mathutils.rnd.expovariate(1.),
priceDistr = mathutils.rnd.lognormvariate(0., .1),
volumeDistr = mathutils.rnd.expovariate(1.)):
orderBook = orderbook.OfTrader()
def create(side):
return LiquidityProviderSideEx(side,
_.orderFactory,
defaultValue,
_.creationInterval,
_.price,
_.volume)
return defs(
Array([
create(Side.Sell),
create(Side.Buy)
]),
{ 'creationInterval': creationIntervalDistr,
'volume' : volumeDistr,
'price' : priceDistr,
'orderFactory' : orderFactory })
def RSI(orderbook, timeframe, alpha):
return defs(_rsi_sub(
constant(100.),
div(
constant(100.),
sum(
constant(1.),
_.rs)),
orderbook,
timeframe),
{ 'rs' : div(Fold(TwoPointFold(_.timer,
_.price,
upMovement),
ewma(alpha)),
Fold(TwoPointFold(_.timer,
_.price,
downMovement),
ewma(alpha))),
'price' : Price(orderbook),
'timer' : scheduler.Timer(constant(timeframe)) \
if timeframe > 0 else\
_.price })
def SafeSidePrice(orderBook, side, defaultValue):
return defs(
NotNoneFloat(
side_price(_.orderBook, side),
NotNoneFloat(
last_side_price(_.orderBook, side),
mathutils.constant(defaultValue))),
{ 'orderBook': orderBook })
def SignalEx(signal = signal.RandomWalk(),
threshold = 0.,
orderFactory = order.MarketFactory,
volumeDistr = mathutils.rnd.expovariate(1.)):
return defs(
Generic(sideFunc = SignalSide(_.signal, threshold),
volumeFunc = volumeDistr,
orderFactory = orderFactory,
eventGen = _.signal),
{"signal" : signal })
def SignalSide(source, threshold = 0):
return defs(ConditionSide(
less_float(
_.threshold,
_.source),
ConstantSide(Side.Buy),
ConditionSide(
less_float(
_.source,
mathutils.negate(_.threshold)),
ConstantSide(Side.Sell),
none_side())),
{ 'source' : source,
'threshold' : mathutils.constant(threshold) })
def RSIbis (timeframe = 0.,
threshold = 30,
alpha = 1./14,
orderFactory = order.MarketFactory,
volumeDistr = mathutils.rnd.expovariate(1.),
creationIntervalDistr = mathutils.rnd.expovariate(1.)):
thisBook = orderbook.OfTrader()
return defs(Generic(orderFactory = orderFactory,
volumeFunc = volumeDistr,
eventGen = scheduler.Timer(creationIntervalDistr),
sideFunc = SignalSide(mathutils.sub(mathutils.constant(50),
_.rsi),
50-threshold)),
{ 'rsi' : observable.RSI(thisBook, timeframe, alpha) })
def DependencyEx (bookToDependOn,
factor = mathutils.constant(1.),
orderFactory = order.MarketFactory,
volumeDistr = mathutils.rnd.expovariate(1.)):
orderBook = orderbook.OfTrader()
r = defs(
Generic(orderFactory= orderFactory,
volumeFunc = volumeDistr,
eventGen = _.dependee,
sideFunc = FundamentalValueSide(orderBook, _.dependee)),
{ 'dependee' : observable.Price(bookToDependOn) })
r._alias = ["Generic", "Dependency"]
return r
def FundamentalValueSide(orderBook, fundamentalValue):
return defs(
ConditionSide(
less_float(
_.fv,
bid_price(
_.orderBook)),
ConstantSide(Side.Sell),
ConditionSide(
less_float(
ask_price(
_.orderBook),
_.fv),
ConstantSide(Side.Buy),
none_side())),
{
'fv' : fundamentalValue,
'orderBook' : orderBook
})
