S&P500 TA: Weekly Bear Div & 20MA Break? Impending Crash?

So we all know that september is a historically difficult month for the entire stock market, and this September has been no different where we've already seen a little over 4% decline in the s&p, but what if this turns into something much bigger like a full blown stock market crash like we've last seen back in March 2020? well there are a few technical clues that could lead to this, the biggest one right off the bat is Bearish Divergence on the Weekly Timescale, at first glance it would look like it's starting to play out, with 3 red weekly candles in a row and the rsi currently sitting around the mid 50's as of 9/21/21 @ 6:42PM CST, but another indicator that could validate this is if we get a solid weekly close below the 20/21 week moving average, it was a combination of these two factors that accelerated the March 2020 selloff, and it could happen again