ATR% represents the implied volatility range of a stock from open to close, calculated using the past 14 days of data (as I use ATR-14 by default).
ATR multiple builds on ATR% by quantifying extension levels as multiples from the 50-MA, serving as a measurable gauge of price extensions. Each security has a historical ATR multiple at which it tends to retrace, though I don’t interpret this as a "short" signal. Instead, I advocate using it as a signal to sell further into strength or avoid initiating new/add entries.
I also utilize ATR multiples from the 50-MA as a measure for broad market indices, assessing technical headwinds versus tailwinds to determine whether to take on risk or hold positions and wait.
Some swing traders profit from $100B+ market cap stocks using a 20-MA sell rule, while others succeed with $100M+ stocks and a 10-MA sell rule. The key is to specialize and align your sell rule with the typical momentum behavior of the assets you trade. When it aligns, it will deliver results.
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