After the surprise dip of 666 points on 2 Feb 2018, Dow Jones Index dropped another 1175 points on 5 Feb 1018, there is total of about 7% correction over the last 2 trading days, strong enough to drive short term traders (who long) out of the game temporarily.

Those algorithmic trading tools which follows the TA rules, when critical short-term support is broken, would rush to find the nearest exit to sell down with high volume recorded, adding to the power of market correction in a short time. There are over 70% stock trading in US is done by robot or algorithmic trading, mostly are trend follower, therefore when there is a flash crash, the robots will follow one another to exit from the stock market or even start the shorting process.

The 7% stock market correction is overdue, especially for US and Hong Kong stock markets which have …