Tradestation 2000i is a good choice especially for end of day and systems trading. For day trading especially if you're an IB customer (because the data is then free) I'd go with SierraChart.
LOL, noting the questions that just appeared above, for what its worth it can track spreads and chart price series from other charts, synchronously and asynchronously.
LOL, noting the questions that just appeared above, for what its worth it can track spreads and chart price series from other charts, synchronously and asynchronously.