When I was doing some day trading using MAs, I used to have a 34/144/610 set of exponential moving averages. If they were aligned from shortest to highest to the upside or downside on the H1 chart, I'd go down to M15 and buy/sell into the first pullback onto them. This works basically in any time frame. For a more sophisticated version, I'd switch the 34 EMA for a 34 exponential Bollinger Band using 0,25 - 0,5 Standard Deviations, which would act as the margin of error for either side.
Honestly, I don't see the point of using MAs if you don't replace them with Bollinger Bands. I wanna know the average AND how much price has deviated from it or, if you're using them as crossovers, I wanna make sure that they've at least crossed their deviations (e.g. 0,5 on the 34 and 0,25 on the 144).