Trendline
Point selection
Specify swing rules, wicks or bodies, two initial anchors and permitted redrawing. Two points determine a straight line; a third touch can satisfy a filter but does not prove validity. Linear and logarithmic scales can produce different lines, while the visible screen angle also depends on chart proportions rather than an intrinsic market property.
The threshold changes with time
A sloping line has a different price at each index. Calculate its threshold at decision time instead of comparing with a fixed earlier number. Confirmed swings appear after required later bars. A perfectly drawn historical line may therefore have been unavailable in that form when the apparent opportunity occurred.
Break versus structure
Crossing a line, breaking a swing and crossing an average are different rules. A line break can support hypotheses of reversal, slowing or noise; it does not determine the cause. Touch count and slope are features to evaluate, not universal guarantees of effectiveness. Keep the specified close-based or intrabar crossing criterion consistent.
