Smart Money Index SMI Strategy Backtest

/*backtest
start: 2022-09-14 00:00:00
end: 2023-09-20 00:00:00
period: 1d
basePeriod: 1h
exchanges: [{"eid":"Futures_Binance","currency":"BTC_USDT"}]
*/

//@version=2
////////////////////////////////////////////////////////////
//  Copyright by HPotter v1.0 01/08/2018
// 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.
//
// You can change long to short in the Input Settings
// WARNING:
// - For purpose educate only
// - This script to change bars colors.
////////////////////////////////////////////////////////////
strategy(title="Smart Money Index (SMI) Backtest", shorttitle="Smart Money Index")
Length = input(18, minval=1)
reverse = input(false, title="Trade reverse")
xcloseH1 = security(syminfo.tickerid, "60", close[1])
xopenH1 =  security(syminfo.tickerid, "60", open[1])
nRes = nz(nRes[1], 1) - (open - close) + (xopenH1 - xcloseH1)
xSmaRes = sma(nRes, Length)
pos = iff(xSmaRes > nRes, 1,
       iff(xSmaRes < nRes, -1, nz(pos[1], 0))) 
possig = iff(reverse and pos == 1, -1,
          iff(reverse and pos == -1, 1, pos))	   
if (possig == 1) 
    strategy.entry("Long", strategy.long)
if (possig == -1)
    strategy.entry("Short", strategy.short)	   	    
barcolor(possig == -1 ? red: possig == 1 ? green : blue ) 
plot(xSmaRes, color=red, title="SMASMI")
plot(nRes, color=green, title="SMI")