twitch indicator

so i was playing twtich top (yay break the meta) vs hecarim. and i was taking minion hits to try and freeze the wave close to my turret, i had to take a few minion hits to get it in just the right spot. once i got the wave where i wanted i backed off and stopped taking minion hits and began last hitting. a few seconds later i see the little pony coming from tri brush, i instantly pressed Q to go invis because i knew he was coming for me. but as it turns out i was still in "recently been hit" combat, and i had to wait 6seconds to go invis. (but how long ago? i hadn't taken any minion damage for at least a solid 5seconds).

so could twitch get an indicator or some kind of timer for his Q saying how long it is before Q will take 1.5s instead of 6s.