I don't because I can't predict the future. I have to place some trades near the edges of the range to see if the range expands. I usually know after 1 or 2 trades. You could also wait for the globex range to expand. For most traders they have a feel for it and it's hard to explain with words.
Based upon your prior commentary about the chop in NQ for that particular trading day in comparison to your most recent commentary of CL and 6E... You're looking for volatility. Simply, take a look at the futures of CL, GC, 6E, TF, DAX, CAC40 and HSI for nice volatility that results in strong directional price movements in comparison to NQ. In fact, most of the traders that I know that trades volatility are trading one or several of these mentioned trading instruments. Mark
Come in the following room and I can show you. I'm mikem in ChaosNsx trading room. http://www.elitetrader.com/vb/showthread.php?s=&postid=2273910#post2273910
when the market is in a range. For example today was a choppy day because we closed almost exactly where we opened.