I trade the SP500 emini futures, so many times during the day the mkt will come rigth up to a trendline and bounce off, or come up to a S/R and bounce off? Does the mkt have a memory? with 70% of the volume coming from algorithmic trading and 30% human traders. I mean how does this happen, that mkt stops on a dime, will come right up to the trendline and bounce off? thank you for your time.