USing an EA to manage trades opened by other EA if there is a magic #

[bighead1971]

I have to ask you forex gurus this question because I have been so curious. There are so many EA's which I want to try but I was wondering if another EA can manage how the EA enters or exits a position opened. here is an example . I have moving average EA  that opens a buy position when the 3 EMA crosses the 34 EMA upward from below at the close of the candle and opposite for sell. I bought the EA like that in ex4 and I cannot modify it. The EA however have a magic #. Here in Mql5 freelance someone can  designed a MTF RSI EA(it has it's own magic # too) that can manage trades opened by that EA depending on if the RSI is above or below a specific threshold when the MA cross happens. So if there is a cross with with EMA's the position will only open if the RSI is above or below 50 for example. Can something like this work based on just changing the magic numbers?