Sizing by Volatility (ATR) Instead of Fixed Shares
Why a fixed number of shares quietly hands you wildly different risk on each trade — and how sizing off recent volatility fixes it.
Imagine you always trade 100 shares. On a sleepy, slow-moving stock that is a small, sane bet. On a stock whipping around violently the same 100 shares can swing your account several times as hard. "Fixed shares" feels consistent, but it secretly gives you wildly different risk from trade to trade. Volatility-based sizing fixes that by asking the only question that matters: how much can this thing realistically move against me?
The problem with fixed share counts
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