Drawing trendlines properly

By the XAUUSDLiveChart Research Desk · 5 min read

A trendline is the simplest tool on the chart and the most abused. Done honestly it is two confirmed swing pivots joined by one straight line whose slope never changes. Done dishonestly it is a curve-fitting exercise: nudge the anchors until history looks respected, then trust a line that was reverse-engineered from the outcome. The discipline is in the anchors.

Two confirmed pivots, one slope

Anchor one: a meaningful swing low (for a rising line). Anchor two: a later, higher confirmed swing low. Confirmed means enough bars printed on both sides that the pivot cannot silently move. Draw through both and extend. From that moment the line is fixed; future candles are judged against it, never used to re-aim it.

The third touch validates

Two anchors define geometry; they cannot prove the market respects it. A third interaction, price approaching the projected line and reacting, upgrades candidate to validated. Crucially the third touch tests the existing line. If it only works after you move an anchor, you have a new candidate line, not a validated old one.

Touch tolerance and wicks

Demand pixel-perfect touches and every line fails; accept anything within a big band and every line passes. A sane tolerance is a small fraction of ATR around the projection. Default to wick extremes for anchors and touches, and never mix a wick anchor with a body anchor on the same line.

Lines that deserve deletion

Delete lines that slice repeatedly through candle bodies, connect trivial pivots, or exist only at exotic angles. And when a line breaks with conviction, it is done as a trendline; its remaining use is watching how price treats the retest from the other side, in the same spirit as break and retest.

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