Market Profile TPO (Time Price Opportunity) histogram and Volume Weighted Average Price (VWAP). Visible chart window range selection. Single segment window anchored. 1-minute TPO. High resolution level size. Market Profile TPO histogram on object gradient indication. Chart 1 Volume by Time bubble graph 15-minute time periods anchored to median price and time. Chart 2 Volume by Time histogram with horizontal oriented on object gradient indication. Chart 3 Vertical oriented indication.