Recomendation: commission and lot size by risk% inside self.sell() and self.buy()

[samueltg92]

Probably this could be implemented when one define to open a sell or buy position:

• Let the user to set a fixed commission in usd per lot traded, example: let the user set 4 usd per lot traded
• Let the user to call the current balance inside the "size" parameter so we can calculate our LOT_SIZE (Larry William's formula) using a risk% and the StopLoss used, example: size = (balance*riskpct)/(slatr*contractsize)

Example:

    if self.data.Close >= self.ema and self.rsi <= 10:
        sl1 = price - slatr
        tp1 = price + slatr*TPSLRatio 
        riskpct = 0.01
        fixedcommission = 4
        contractsize = 100000

        self.buy(sl=sl1, tp=tp1, size = (balance*riskpct)/(slatr*contractsize), commission = fixedcommission)
        

    if self.data.Close <= self.ema and self.rsi >= 90:
        sl2 = price + slatr
        tp2 = price - slatr*TPSLRatio
        riskpct = 0.01
        fixedcommission = 4
        contractsize = 100000            

        self.sell(sl=sl2, tp=tp2, size = (balance*riskpct)/(slatr*contractsize), commission = fixedcommission)

[samueltg92]

It could be also helpful if it can plot the return distribution and the trades lot distribution (to see how the risk management is working)

[kernc]

Sure, share the plot, but leave out any meaningful code. 😝

If you take Strategy.equity for balance, you can compute appropriate size= yourself.

Other than that, I see this issue is a duplicate of #623.

Welcome to use Discussions to address broader topics/ideas.

[samueltg92]

Lol sorry, I'm learning coding for not so long ago.