AMEX:SPY   SPDR S&P 500 ETF TRUST
The red dotted lines from peak are cloned from previous peak in March. It gives a projection of slope duration and price move down from peak in August to give some predictive expectation of price if it repeats previous. Fib lines are important and the .618 line at $387 being lost will be the next expected move up and then fall further to $335 area by Nov. 2022. This predictive only and nothing more as the market is very dynamic.
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