My very first effort so be kind. A MSFT Short below 45.90

I've just learning and my focus has been on the EMA9. Price has been below it for 4 days with 2 starting and 1 finishing right at 45.90. 45.46 looks like more of a resistance line and I think if we get another neg day it could blow right through to 44.76 or even 42.86. My idea fails upon a close above the EMA9 but I think that's too tight for a physical stop.