The manual says the commission is:
Roundturn commission amount in account currency units for opening and closing one contract, per 10000 units for currencies, per unit for other assets, or as percent of the trade value when negative. Accessible with the Commission variable. When manually entering the commission, double it if was single turn.
If the commission is a percentage of the trade value, enter the negative percent value, f.i. -0.25 for 0.25%.

But in stock trading, percentage commission is based on single run. for example, you buy a share at price 100, you pay commssion 0.25% * 100. Then you sell that stock at price 110, you pay commission 0.25%*110. Is it possible to let zorro support this commission mode?


For now, if I set commission to 0.25%, zorro will calculate total commssion as 0.25%*100 for the above trade. If I set commission to 2*0.25%, then zorro will calculate total commssion as 2*0.25%*100 for the above trade. Both is not correct, the correct total commission is 0.25%*100 + 0.25%*110.