BTC Supertrend (ATR 10, mult 3)
LockedATR-based trailing stop — flips between green support and red resistance.
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What's behind the gate
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What this chart shows
Methodology
Built on Wilder ATR(10). hl2 = (high + low) / 2; basicUp = hl2 + 3 × ATR; basicDn = hl2 − 3 × ATR. The final bands ratchet (up-band only ratchets down; dn-band only ratchets up) and the trend flips when close crosses the opposite final band. The plotted Supertrend line is the active final band — green while close > line (uptrend, line acts as trailing support); red while close < line (downtrend, line acts as resistance).