I use bigcharts to assist with day trading S&P 500 mini because of its ease of use and flexibility to set moving averages (SMA2), and other indicators. I have multiple charts open with different ticks (1min, 5 min, 15 min) to get confirmation signals when comparing the different chart tick times and associated indicators (ie various sma2).
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The problem is I have to mentally adjust the BigCharts price (spx) to get to the real contract price (for ES(cont)) in my trading platform. The difference is usually around 3.5. Don't know if I explained that well, but I think you will see what I mean when you try it. BTW, the BigChart's prices seem to be fairly real time when you refresh. during market hours, of course.
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My trading platform is Strategy Runner and (Web Runner -at office no installed downloads). Strategy runner (installed software) has many trading indicators but I haven't figured out how to get them to work the way I need to make trading decisions. Anyway, many of my trades are made on Web runner which has no indicators so I have to make do.
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BigCharts (combined with my trading set up criteria) works OK for me to determine entry and exit points so I can do 1-3 different RT trades a day and I am averaging 1.6 points gain per contract including stopped out losing trades. I know, not great, but I am still learning and only do this part time (full time job). I miss so many good trades during the day, but oh well, got to pay the bills.
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I have only been trading for a few months, making some money and having lots of fun. I have a dull job so this (diversion) helps a lot. Thanks to all you real traders and your advise. It has been most helpful.