Backtest EMA 9 vs AMA 21

I need to do a historical backtest with the following strategy:

Activation:

1) First EMA 9 must cross SMA 21

2) After that, enter 50% if the price returns to EMA 9, that is, the first entry is to PULLBACK at an average of 9.

3) If the price finds an average of 21, enter the rest (50%).

Departures:

1) I don't have a gain objective, I would like to know if there is a way for the backtest to provide me with the best gain for this strategy

Stop:

1) The Stop occurs when the average of 9 crosses again the average of 21 in the opposite direction, attention:

2) the stop only occurs after the averages cross AND THE PRICE PULLBACKS TO THE AVERAGE OF 9 (again), in the opposite direction this time, that is, both the entry and the stop are only triggered in the pullback of the average of 9 AFTER the crossing of the averages. So, if the first time you entered long and the average crossed to sell, expect to pullback at the average of 9, perform the stop and go short (again, 50% of total order) . If the price touches the average of 21, (more 50%) .