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// Copyright by HPotter v1.0 10/06/2014
// Attention:
// If you would to use this indicator on the ES, you should have intraday data 60min in your account.
//
// Smart money index (SMI) or smart money flow index is a technical analysis indicator demonstrating investors sentiment.
// The index was invented and popularized by money manager Don Hays.[1] The indicator is based on intra-day price patterns.
// The main idea is that the majority of traders (emotional, news-driven) overreact at the beginning of the trading day
// because of the overnight news and economic data. There is also a lot of buying on market orders and short covering at the opening.
// Smart, experienced investors start trading closer to the end of the day having the opportunity to evaluate market performance.
// Therefore, the basic strategy is to bet against the morning price trend and bet with the evening price trend. The SMI may be calculated
// for many markets and market indices (S&P 500, DJIA, etc.)
//
// The SMI sends no clear signal whether the market is bullish or bearish. There are also no fixed absolute or relative readings signaling
// about the trend. Traders need to look at the SMI dynamics relative to that of the market. If, for example, SMI rises sharply when the
// market falls, this fact would mean that smart money is buying, and the market is to revert to an uptrend soon. The opposite situation
// is also true. A rapidly falling SMI during a bullish market means that smart money is selling and that market is to revert to a downtrend
// soon. The SMI is, therefore, a trend-based indicator.
// Some analysts use the smart money index to claim that precious metals such as gold will continually maintain value in the future.
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study(title="Smart Money Index (SMI)", shorttitle="Smart Money Index")
xcloseH1 = security(tickerid, "60", close)
xopenH1 = security(tickerid, "60", open)
nRes = nz(nRes[1], 1) - (open - close) + (xopenH1 - xcloseH1)
plot(nRes, color=green, title="SMI")