medium-4-8.py

def go_long(self):
    # entry: the high of the current candle
    entry = self.high
    stop = entry - ta.atr(self.candles)*3
    qty = utils.risk_to_qty(self.capital, 5, entry, stop)

    last_20_highs = self.candles[-20:, 3]
    previous_high = np.max(last_20_highs)

    self.buy = qty, entry
    self.stop_loss = qty, stop
    # (first) take-profit: the high of the last 20 candles
    self.take_profit = qty/2, previous_high