Once you load Sentinel on your chart, pop-up box will appear showing the settings of your EA. Make sure that all the settings and alerts are correct before clicking OK.
Sentinel Stock market crash filter settings:
Stock Market Crash Filter Enabled - enable/disable the stock market crash filter.
Stock Market Symbol - symbol name of the S&P500 stock index of your broker. It is usually called something like US500 or SPX500 (press Ctrl+U to see all symbols).
Filter Period - period of the stock market crash filter.
Max Historical Volatility (HV), in % - max. annualized standard deviation of H1 returns (HV in %).
Block Trading for the Entire Day - prohibits opening new trades throughout the day if HV hits the specified level just once at any moment during the day