Thank you to reply me!
I think that I didn't explain the problem clearly.
I have try your method that by changing the input to Charge Move and entering the time,but I must realse the Button Sequences "Back" then press the Button Executions "Back", then it can trigger the move.
Think this situation:
Dash back : Button Sequences "Hold Back" and Button Executions "Button 1"
I want whenever that I hold the "Back button"(Button Sequences) then press the "Button 1"(Button Executions), it can trigger dash move,I needn't release the "Back button" I mean "Back button" is still be hold, and next time the "Back button" is still hold down that never release and I press the "button 1" it can trigger the dash move again.
What should I do?