I did the trial. For exactly 2 days. One huge problem up front: For day-trading, having pre-market chart data is crucial and stock-charts does not offer that. Also, some traders trade outside of the day. Not having data pre and post market is utterly inexcusable considering others offer this functionality for free as well as the ability to actively zoom in and out. If I have to use another charting service to check the pre-market, what is the point of paying stock-charts for their service? My assumption was that a paid charting service would be a one stop shop for traders needing a quality charting service, I assumed wrong.