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This indicator is based on the Cboe EuroCurrency Volatility Index, also known as Euro VIX and has a ticker symbol of EVZ . It basically measures volatility in the Eur/USD exchange rate but it can be used to track overall volitility in the Forex market. It's best usage is to add it to your system as a mandatory tool, when the value is above 7, you can expect some movement in the market, so you can trade at full risk, when the value is below 7, you trade with less risk or don't trade at all.