Multi factor Reversal Trading Strategy

/*backtest
start: 2023-09-11 00:00:00
end: 2023-09-13 08:00:00
period: 1m
basePeriod: 1m
exchanges: [{"eid":"Futures_Binance","currency":"BTC_USDT"}]
*/

//@version=4
////////////////////////////////////////////////////////////
//  Copyright by HPotter v1.0 16/04/2021
// 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 Polarized Fractal Efficiency (PFE) indicator measures the efficiency 
// of price movements by drawing on concepts from fractal geometry and chaos 
// theory. The more linear and efficient the price movement, the shorter the 
// distance the prices must travel between two points and thus the more efficient 
// the price movement.
//
// 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


PFE(Length,LengthEMA,BuyBand,SellBand) =>
    pos = 0.0
    PFE = sqrt(pow(close - close[Length], 2) + 100)
    C2C = sum(sqrt(pow((close - close[1]), 2) + 1), Length)
    xFracEff = iff(close - close[Length] > 0,  round((PFE / C2C) * 100) , round(-(PFE / C2C) * 100))
    xEMA = ema(xFracEff, LengthEMA)
    pos := iff(xEMA < SellBand, -1,
    	      iff(xEMA > BuyBand, 1, nz(pos[1], 0))) 
    pos

strategy(title="Combo Backtest 123 Reversal & PFE (Polarized Fractal Efficiency)", 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, "---- PFE ----")
LengthPFE = input(9, minval=1)
LengthEMA = input(5, minval=1)
BuyBand = input(50, step = 0.1)
SellBand = input(-50, step = 0.1)
reverse = input(false, title="Trade reverse")
posReversal123 = Reversal123(Length, KSmoothing, DLength, Level)
posPFE = PFE(LengthPFE,LengthEMA,BuyBand,SellBand)
pos = iff(posReversal123 == 1 and posPFE == 1 , 1,
	   iff(posReversal123 == -1 and posPFE == -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 )