Do you ever check the total volume on Intraday charts and compare with Daily chart volume? Are there differences? Yes or no, would be obliged if you could mention the feed. I use Sierra Charts with Interactive Brokers. For Futures, what I have found by adding up the Intraday volume is it totals up to about half the actual Daily volume. Since IB is snapshot data, I figured the Sierra Charts Historical Intraday Futures data would be more accurate. No such luck, same problem. I have sent a message to SC asking about this. I don't day trade so the likes of IQ feed would be more than I would pay for. So far eSignal OnDemand (delayed) is not an option with SC, but it apparently is in the pipeline. Barcharts is an option for delayed data, but I'm wondering about the accuracy. Very little interest in paying for real time tick data, in my experience whenever there is a fast market the feed lags, ie more trouble than it is worth.