Often when the slow line is sloping down (criteria '2') and the fast line is below it the move can be more muted/choppy.
SPY - slow line sloping down and fast line bumping into it; the breakout (below, left and second to right up arrow) was successful, but the most recent one was more muted (note hourly below, right fast line < slow line as we consolidate, can still break higher and see a fast/slow line cross).
QQQ - Daily (below, left) the most recent up arrow saw the fast line clearing above the slow line
IWM - Daily (below, left) fast line is decidedly above slow line. Most recent break out saw much more momentum than the SPY