EMA Crossover Systems

I have a question about EMA crossover systems which use EMAs that apply to the close price.

Those of you who use or have used such systems, do you enter and exit after crossover only when the candle closes or whenever the cross occurs? This seems to be the big issue with these systems especially on higher timeframes such as the four hour because there could be many fake outs.

Is it sometimes the one or the other? Or do you always either make your move at the close of the candle or whenever the cross occurs?

What advice can you give? Thanks

when i used to use ma crossover systems, i always liked to see the candle close before i traded because many times the ma's would bounce off each other. but it is a double edged sword, ma systems are already fairly lagging indicators, on top of that waiting for a close might make the entry too late. you have to judge what to do depending on the volatility of the pair. but for me, i always waited for a close. just my two cents.