Why does it strong sell signal? Because it was trading lower the uptrend line and had been retest the price at an hour ago.
So the resistance react very strong push the price down immediately when price hit the resistance zone. So we wait for the retest again for the better position and lower risk.
This is 1: 3 risk and reward ratio.
Beware : Don't trade overload your balance. Try to do the money management , the opportunities are everywhere , no hurry for just a trade!