Code:
/castsequence [nomod]reset=3 Trap Launcher, Freezing Trap
This is the double-tap macro for trap launching a Freezing Trap. It doesn't use double the focus, and it resets after three seconds. Simply click/press once to activate Trap Launcher, then a second time to get a targeting reticle for your trap. Replace Freezing Trap with any other and get the same result for the other traps. Replace each of the traps on your bars (or hotkeys) with macros like this so that you can double-tap to trap launch.