Hi,
I wish to share my view,
It is acceptable the EMA cross over is lagging indicator in general,
But it is the best when market is trending,you can find it visual back test.
As lagging indicator it generating Late entry and exit which may decrease
your profit percentage. You can try to test Dual time frame.
For intraday I will prefer lower parameter for EMA crossover and higher
parameter EMA for Trend Identification which act as filter to me.
When you use PA or SD concept in Lower time frame you may find edge
of your setup like logical early entry, Low R:R and Early indication of
Reversal or pull back....
All the best