Purpose of the observation:
Use ES weekly chart RSI /Price Divergence to continuously monitor US market and predict the crashing timing.
S&P500 ES (between 11-Dec-06 and 28-May-07) RSI diverged from price.
S&P500 ES (between 28-May-07 and 08-Oct-07) RSI diverged from price again. The US stock market crashed from that day.
S&P500 ES (6-Oct-08 and 02-Mar-09) RSI diverged from price, indicating the bottom of the US stock market.