Comparative Risks Of Longer
One reason not to trade longer time frames on a highly leveraged index future such as the eMini is a chart such as this. This drop of over 7 points occurred in less than two minutes. If you were quick you could have picked up at least the drop from 1091 to 1084. If you were waiting for a bar to print, and you were long, you might have taken a seven to eleven point loss.