The reasons are that if a certain line in the sand is crossed, technical analysis of similar price action over the past N decades indicates that price will continue moving in the direction of the breach until price gets to, or close to, the next key S/R level in line to be tested. So if you're looking to buy low, you wait for that next level and watch the reaction there to decide whether to buy or not. Chances are pretty good that initiating buyers will sit on the sidelines until that key level is approached, initiating sellers will want to get in close to where the line in the sand was crossed, and longs who don't want to risk the full excursion to that next S level will sell part or possibly all of their position, all of which tends to accelerate the downward momentum.
That's fine from trading standpoint, but what is the cause of those patterns forming in your opinion? They form randomly, then attract people and become non-random or form as non-random action from the start?






