I use Interactive Brokers and scalp the 1m chart. I am comparing with other chart providers to see if I can find a feed with more updates per second. Charles Schwab StreetSmart Edge eSignal ProRealTime I find Charles Schwab and eSignal update quite slowly, maybe 2-3 times a second on average - slower than TWS. ProRealTime has significantly faster updates; the candles move faster and seem to react sooner, and I find this is helpful in judging price action. I've heard that eSignal has one of the best feeds (although that could just be marketing bluff) so before I write it off, I was wondering if I was doing something wrong or mis-configued something. What are your experiences with eSignal? Are there any other data providers I should be looking at for low latency and high resolution real time data for S&P E-Mini futures and SPY? My servers are located in a datacentre and I RDP to see the charts, so bandwidth and processing power at my end is not an issue. My current datacentre is in the UK, although I could run from AWS US-East if there would be any advantage.