Commissions per trade

In A:slightly_smiling_face:
In Amibroker backtest, if I select, say, 0.1% commission in backtestest setting, is that for 0.1% of entry trade plus 0.1% of exit trade?
Harry from Australia

...or is backtester only allowing for 0.1% for whole trade?

@harryzehnwirth commissions are calculated for every operation/order (buy, sell, short or cover).
In such a way the expenses are properly accounted also when you scale in/out, and you have multiple operations/orders before squaring the position.

You can verify it quickly with a snippet like this one below, that will open and close a position on a single bar using the BuyPrice == SellPrice, so there is no gain or loss on the traded instrument, and the only loss is actually due to the commissions.

SetOption("InitialEquity", 100000 ); // set initial equity = 100K
maxpos = 1; // maximum number of open positions
SetOption( "MaxOpenPositions", maxpos );
SetPositionSize( 100, spsShares ); // number of shares/contracts per trade

// SetOption("CommissionMode", 2); //  $ per trade 
// SetOption("CommissionAmount", 5); // 
SetOption("CommissionMode", 1); //  percent 
SetOption("CommissionAmount", 0.1); // 

SetOption("AllowSameBarExit", True);
Buy = 1;
Sell = 1;
BuyPrice = SellPrice = Avg;

Apply it to the *Current Symbol / 1 Recent bar, and do a Backtest.

You'll see that the loss will amount to 2 * your commissions.

immagine

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Thank you again Beppe
Harry:slightly_smiling_face:

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