profit calculation seems to be wrong

[jambhala]

I'am doing my first steps with backtrader and I tried from https://www.backtrader.com/home/helloalgotrading/:

import backtrader as bt
import yfinance as yf

start_date = "2020-01-03"
end_date = "2021-09-28"

# Create a subclass of Strategy to define the indicators and logic

class SmaCross(bt.Strategy):
    # list of parameters which are configurable for the strategy
    params = dict(
        pfast=10,  # period for the fast moving average
        pslow=30   # period for the slow moving average
    )

    def __init__(self):
        sma1 = bt.ind.SMA(period=self.p.pfast)  # fast moving average
        sma2 = bt.ind.SMA(period=self.p.pslow)  # slow moving average
        self.crossover = bt.ind.CrossOver(sma1, sma2)  # crossover signal

    def next(self):
        if not self.position:  # not in the market
            if self.crossover > 0:  # if fast crosses slow to the upside
                self.buy()  # enter long

        elif self.crossover < 0:  # in the market & cross to the downside
            self.close()  # close long position


cerebro = bt.Cerebro()  # create a "Cerebro" engine instance

# Create a data feed
data = bt.feeds.PandasData(dataname=yf.download('MSFT', start_date, end_date))


cerebro.adddata(data)  # Add the data feed


cerebro.addstrategy(SmaCross)  # Add the trading strategy
for cash in [10000, 100000, 1000000]:
    cerebro.broker.setcash(cash)
    initial_cash = cerebro.broker.getvalue()
    cerebro.run()  # run it all
    print(f"initial cash = {initial_cash} profit = {cerebro.broker.getvalue() - initial_cash}")

The simulation results in a profit of 58 no matter how large the initial cash is. What is wrong here?

[rajanprabu]

@jambhala

change size of the order.. by default its ordering 1 qty..

self.buy() 

[jambhala]

@rajanprabu Thank you for your prompt response