I day-trade the S&P E-mini Futures. I understand that the large brokerage firms and the professional traders usually have significant "buy" and "sell" numbers (trade bands) that they look for and aggressively trade off of during the day. The trade bands I've seen usually consist of two "buy" numbers and two "sell" numbers, used for either trade initiation or profit targets. I have been able to compute bands that come close to the numbers they use, but not close enough. Does anyone have any formulas they would be willing to share that may be used daily, to get me a little closer to the numbers the pros use? Thanks, in advance, for your help.