My first question is whether volume affects range. In other words, I think that if we don't have many people trading on a given day, the market doesn't move. I have to test this: 1. Daily Volume related to Daily Range? (Constant relationship?) If the above hypothesis is true, question number 2 is if pre-open volume (on futures) and yesterday's volume can give us a good estimate of what the volume for the upcoming day will be. I have to test this as well. So: 2. Today's Pre-open volume related to Today's volume? 3. Yesterday's volume related to Today's volume? And last, "pre-open" range itself could be a good way to estimate today's coming range. Once again, we have to test it: 4. Pre-open range related to daily range? If we found these hypotheses to be true, then we could predict today's range, based on past volume (and/or range). A small range for the day would mean allowing only range trades (within support and resistance), and a large range would mean allowing only trend trades (beyond support and resistance).