OFS StructureMapper
Your platform can draw a trendline. What it cannot do is tell you which line deserves to exist, how many times price actually respected it, or that it broke two hours ago. That is this indicator's whole job: it draws only the levels worth drawing, scores every one of them 0-100, says BROKEN when the market genuinely left a level, and takes it off the chart once it stops mattering. Nothing extra required — no footprint, no market depth, no subscription.