Buying/selling the other way round backtester vs. forward tester

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Hi!

This is a MartingaleEA for the DAX. https://fxdreema.com/shared/ZbX3EpCT

It should buy when the last sell was a loss and it should sell when the last loss was a buy. When there is a winner before the Martingale count is reached it should buy afterwards if the winner was buy, or sell if the winner was sell.

It works like that in the backtester. When I use it in forwardtesting buying and selling is the other way round. I checked it twice, so I hope there is no user error.

Thanks for help ste