Using IB's chart program, and all other brokers that I know of, the candlesticks on the chart, specifically the high and lows are often inaccurate by 1-5 ticks, depending on contract traded, and if the candle was a high volume spike or not. The chart seems to round the candlesticks, shaving off the some trades, however, this only happens on probably 5% of all candles on the chart or less, so its very hard to account for in ones trading, especially when using tight stops...As sometimes you will make the trade on the chart, however, you find out that you got stopped out, and looking at the T&S, there indeed was a few trades that traded at that price point, but it doesn't show up on the chart. This "rounding" occurs whether looking at a high timeframe, or right down to a tick by tick chart, it still will leave out the lowest/highest ticks sometimes. When putting the data feed into a program like Sierra Charts, it is the same problem. So, does anyone know of a charting program that will accurately (precisely) reflect the datafeed? Its a ridiculous problem and has always baffled me why the charts don't display accurate data.