What this is Draws the high and low of a configurable session window together with the recent range history, so the levels that price has repeatedly reacted to are visible without hand-drawing them every day. What it does Marks the high and low of a configurable session for the last N sessions as extending levels. Historical session ranges kept as live trend lines, configurable wrap-around sessions. Runs as an Expert Advisor attached to a single chart. No DLL calls. No external services. No netw