question

I think if want to cross sign ,need MAnow and MAprevious
I think not need MAafter
Because only MAnow and MAprevious can make sign,i think.

How do you think??

This is code.
↓
if ( (fasterMAnow > slowerMAnow) && (fasterMAprevious < slowerMAprevious) && (fasterMAafter > slowerMAafter))