> Does the Strategy Tester use the commission?EA Studio uses commission, for sure. Regarding the MetaTrader's Tester - nothing is sure.
> If I remove the commission from the symbol in EA Studio, the end price of both EA Studio and the Strategy Tester are similar.
The commission can be applied "per side" (both at Open and Cose) or at Close only.
It can be of a fixed amount or per round lot.
Please check various variants and see what makes sense in your case.
Your broker's website must list commission information (however, we never know what the MT Tester is doing).
Having a Balance curve shape similar to EA Studio and MT Tester is enough to guarantee the correctness of the backtest.
I also struggle to receive the exact results. Sometimes I cannot figure out how the MT calculates a simple position that enters at Bar Open and exits at the next Bar Open with perfectly known prices and fixed spread.
> Also, I notice in your Strategy Tester that it only shows balance line, whereas in my Strategy Tester, it shows the balance/equity line.
This depends on the strategy.
If a strategy keeps the positions open for a short time, the Balance line and the Equity line overlap.
If a strategy keeps the position open for a long time, the Balance line is a horizontal line from the Open price until the bar before the closing. The Balance will jump to the closing price at the closing bar.
On the other hand, the Equity line is calculated from the floating profit/loss at every bar.
It may significantly deviate from the balance line and will be visible.
The Equity line is more fluid. That's why we calculate the Drawdown metrics on the Equity line.
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