ডাবল ব্যালেন্স বুল-বিয়ার কৌশল

/*backtest
start: 2023-09-29 00:00:00
end: 2023-10-29 00:00:00
period: 1h
basePeriod: 15m
exchanges: [{"eid":"Futures_Binance","currency":"BTC_USDT"}]
*/

//@version=4
////////////////////////////////////////////////////////////
//  Copyright by HPotter v1.0 03/07/2019
// 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
//    This new indicator analyzes the balance between bullish and
//    bearish sentiment.
//    One can cay that it is an improved analogue of Elder Ray indicator.
//    To get more information please see "Bull And Bear Balance Indicator" 
//    by Vadim Gimelfarb. 
//
// 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

BullAndBearBalance(SellLevel, BuyLevel) =>
    pos = 0
    value =  iff (close < open , 
              iff (close[1] > open ,  max(close - open, high - low), high - low), 
               iff (close > open, 
                 iff(close[1] > open, max(close[1] - low, high - close), max(open - low, high - close)), 
                  iff(high - close > close - low, 
                   iff (close[1] > open, max(close[1] - open, high - low), high - low), 
                     iff (high - close < close - low, 
                      iff(close > open, max(close - low, high - close),open - low), 
                       iff (close > open, max(close[1] - open, high - close),
                         iff(close[1] < open, max(open - low, high - close), high - low))))))

    value2 = iff (close < open , 
              iff (close[1] < open ,  max(high - close[1], close - low), max(high - open, close - low)), 
               iff (close > open, 
                 iff(close[1] > open,  high - low, max(open - close[1], high - low)), 
                  iff(high - close > close - low, 
                   iff (close[1] < open, max(high - close[1], close - low), high - open), 
                     iff (high - close < close - low, 
                      iff(close[1] > open,  high - low, max(open - close, high - low)), 
                       iff (close[1] > open, max(high - open, close - low),
                         iff(close[1] < open, max(open - close, high - low), high - low))))))
    nBBB = value2 - value
    pos := iff(nBBB < SellLevel, -1,
    	   iff(nBBB >= BuyLevel, 1, nz(pos[1], 0))) 
    pos

strategy(title="Combo Backtest 123 Reversal & Bull And Bear Balance", shorttitle="Combo", overlay = true)
Length = input(14, minval=1)
KSmoothing = input(1, minval=1)
DLength = input(3, minval=1)
Level = input(50, minval=1)
//-------------------------
SellLevel = input(-15, step=0.01)
BuyLevel = input(15, step=0.01)
reverse = input(false, title="Trade reverse")
posReversal123 = Reversal123(Length, KSmoothing, DLength, Level)
posBullAndBearBalance = BullAndBearBalance(SellLevel, BuyLevel)
pos = iff(posReversal123 == 1 and posBullAndBearBalance == 1 , 1,
	   iff(posReversal123 == -1 and posBullAndBearBalance == -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 )