RSI 50 level on Weekly - buy above 50, sell below 50

the rsi 50 on the weekly for amzn has been the most powerful rsi trend line on this stock so far for the last 5 years. Every time it is above, the price action rises, everytime it is below, price action falls. Notice that each blue box causes a relative spike in price action, in either way. I shorted at the blue box from about a month ago and profited nicely. The same thing should happen at the current blue box.