How can I undo a negative "Star" rating for a purchased produkt on market place?

 
I have given a given a negative star rating for a product. How can I undo this?
Because the EA started trading now and I gave the negative star because it did not open trades for a few days, although the backtest did open many trades in the same period.

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Volker Albrandt:
I have given a given a negative star rating for a product. How can I undo this?
Because the EA started trading now and I gave the negative star because it did not open trades for a few days, although the backtest did open many trades in the same period.

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You should have an edit option on the right side of your review.