def _reduce(self, qty: float, price: float) -> None:
if self.is_open is False:
raise EmptyPosition('The position is closed.')
# just to prevent confusion
qty = abs(qty)
estimated_profit = jh.estimate_PNL(qty, self.entry_price, price,
self.type)
if self.exchange:
# self.exchange.increase_futures_balance(qty * self.entry_price + estimated_profit)
self.exchange.add_realized_pnl(estimated_profit)
self.exchange.temp_reduced_amount[jh.base_asset(
self.symbol)] += abs(qty * price)
if self.type == trade_types.LONG:
self.qty = subtract_floats(self.qty, qty)
elif self.type == trade_types.SHORT:
self.qty = sum_floats(self.qty, qty)
info_text = 'REDUCED position: {}, {}, {}, {}, ${}'.format(
self.exchange_name, self.symbol, self.type, self.qty,
round(self.entry_price, 2))
if jh.is_debuggable('position_reduced'):
logger.info(info_text)
if jh.is_live(
) and config['env']['notifications']['events']['updated_position']:
notifier.notify(info_text)
def _increase(self, qty: float, price: float) -> None:
if not self.is_open:
raise OpenPositionError(
'position must be already open in order to increase its size')
qty = abs(qty)
size = qty * price
# if self.exchange:
# self.exchange.decrease_futures_balance(size)
self.entry_price = jh.estimate_average_price(qty, price, self.qty,
self.entry_price)
if self.type == trade_types.LONG:
self.qty = sum_floats(self.qty, qty)
elif self.type == trade_types.SHORT:
self.qty = subtract_floats(self.qty, qty)
info_text = 'INCREASED position: {}, {}, {}, {}, ${}'.format(
self.exchange_name, self.symbol, self.type, self.qty,
round(self.entry_price, 2))
if jh.is_debuggable('position_increased'):
logger.info(info_text)
if jh.is_live(
) and config['env']['notifications']['events']['updated_position']:
notifier.notify(info_text)
def test_subtract_floats():
assert utils.subtract_floats(9.813, 9.71) == 0.103
assert utils.subtract_floats(-1.123, 1.2) == -2.323
assert utils.subtract_floats(1.123, -1.2) == 2.323
assert utils.subtract_floats(-1.123, -1.2) == 0.077
