I want to develop a custom indicator that could plot aggregated normalized volume of 40 chosen stocks. The indicator needs to access 40 stocks' bid ask volume and price. I want to know whether esignal or tradestation support the following required features: 1. 30 days historical tick data; 2. Chart Indicator could access 40+ plus stock's (bid/ask volume and price) tick data at the same time; The chart has only 2 panes, SPY price pane and this indicator's pane. Thank you very much for your information.