Not that I scalp, but I would like to know if IB's data is good enough to do so. I will not be renewing my eSignal subscription and am testing Ensign with IB as the data source. Presently, I am only using the demo version of TWS, which is delayed, to assess the functionality of Ensign. Therefore, I cannot presently compare IB's real time price movement against my order entry platform's streaming data. However, I would like to know how it compares before I actually open an account with IB. And so, I am directing my question to those of you who use IB's data for your charting applications. Please advise.