Chiến lược chỉ số động lượng đảo ngược kép

/*backtest
start: 2024-01-06 00:00:00
end: 2024-02-05 00:00:00
period: 1h
basePeriod: 15m
exchanges: [{"eid":"Futures_Binance","currency":"BTC_USDT"}]
*/

//@version=4
////////////////////////////////////////////////////////////
//  Copyright by HPotter v1.0 07/06/2021
// This is combo strategies for get a cumulative signal. 
//
// First strategy
// This System was created from the Book "How I Tripled My Money In The 
// Futures Market" by Ulf Jensen, Page 183. This is reverse type of strategies.
// The strategy buys at market, if close price is higher than the previous close 
// during 2 days and the meaning of 9-days Stochastic Slow Oscillator is lower than 50. 
// The strategy sells at market, if close price is lower than the previous close price 
// during 2 days and the meaning of 9-days Stochastic Fast Oscillator is higher than 50.
//
// Second strategy
// The Relative Momentum Index (RMI) was developed by Roger Altman. Impressed 
// with the Relative Strength Index's sensitivity to the number of look-back 
// periods, yet frustrated with it's inconsistent oscillation between defined 
// overbought and oversold levels, Mr. Altman added a momentum component to the RSI.
// As mentioned, the RMI is a variation of the RSI indicator. Instead of counting 
// up and down days from close to close as the RSI does, the RMI counts up and down 
// days from the close relative to the close x-days ago where x is not necessarily 
// 1 as required by the RSI). So as the name of the indicator reflects, "momentum" is 
// substituted for "strength". 
//
// WARNING:
// - For purpose educate only
// - This script to change bars colors.
////////////////////////////////////////////////////////////
Reversal123(Length, KSmoothing, DLength, Level) =>
    vFast = sma(stoch(close, high, low, Length), KSmoothing) 
    vSlow = sma(vFast, DLength)
    pos = 0.0
    pos := iff(close[2] < close[1] and close > close[1] and vFast < vSlow and vFast > Level, 1,
	         iff(close[2] > close[1] and close < close[1] and vFast > vSlow and vFast < Level, -1, nz(pos[1], 0))) 
	pos


RMI(Length,BuyZone, SellZone) =>
    pos = 0.0
    xMU = 0.0
    xMD = 0.0
    xPrice = close
    xMom = xPrice - xPrice[Length]
    xMU := iff(xMom >= 0, nz(xMU[1], 1) - (nz(xMU[1],1) / Length) + xMom, nz(xMU[1], 1))
    xMD := iff(xMom <= 0, nz(xMD[1], 1) - (nz(xMD[1],1) / Length) + abs(xMom), nz(xMD[1], 0))
    RM = xMU / xMD
    nRes = 100 * (RM / (1+RM))
    pos:= iff(nRes < BuyZone, 1,
    	   iff(nRes > SellZone, -1, nz(pos[1], 0))) 
    pos

strategy(title="Combo Backtest 123 Reversal & Relative Momentum Index", shorttitle="Combo", overlay = true)
line1 = input(true, "---- 123 Reversal ----")
Length = input(14, minval=1)
KSmoothing = input(1, minval=1)
DLength = input(3, minval=1)
Level = input(50, minval=1)
//-------------------------
line2 = input(true, "---- Relative Momentum Index ----")
LengthRMI = input(20, minval=1)
BuyZone = input(40, minval=1)
SellZone = input(70, minval=1)
reverse = input(false, title="Trade reverse")
posReversal123 = Reversal123(Length, KSmoothing, DLength, Level)
posRMI = RMI(LengthRMI,BuyZone, SellZone)
pos = iff(posReversal123 == 1 and posRMI == 1 , 1,
	   iff(posReversal123 == -1 and posRMI == -1, -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)	 
if (possig == 0) 
    strategy.close_all()
barcolor(possig == -1 ? #b50404: possig == 1 ? #079605 : #0536b3 )