Institutions rarely hold risk into the weekend. Every Friday between 2:00 PM and 3:00 PM EST, expect a sell-off. Use this to buy dips for a Monday morning pop, or short the close.
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Most traders use the .382, .50, and .618 retracements. The secret is the level. Institutions often place their limit orders here. If a stock retraces 78.6% of a previous move without breaking the original low/high, it is the most powerful entry zone in the market. Institutions rarely hold risk into the weekend