Chiến lược theo xu hướng đảo ngược kép

/*backtest
start: 2023-11-12 00:00:00
end: 2023-12-12 00:00:00
period: 1h
basePeriod: 15m
exchanges: [{"eid":"Futures_Binance","currency":"BTC_USDT"}]
*/

//@version=4
////////////////////////////////////////////////////////////
//  Copyright by HPotter v1.0 15/04/2021
// 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 Performance indicator or a more familiar term, KPI (key performance indicator), 
// is an industry term that measures the performance. Generally used by organizations, 
// they determine whether the company is successful or not, and the degree of success. 
// It is used on a business’ different levels, to quantify the progress or regress of a 
// department, of an employee or even of a certain program or activity. For a manager 
// it’s extremely important to determine which KPIs are relevant for his activity, and 
// what is important almost always depends on which department he wants to measure the 
// performance for.  So the indicators set for the financial team will be different than 
// the ones for the marketing department and so on.
//
// Similar to the KPIs companies use to measure their performance on a monthly, quarterly 
// and yearly basis, the stock market makes use of a performance indicator as well, although 
// on the market, the performance index is calculated on a daily basis. The stock market 
// performance indicates the direction of the stock market as a whole, or of a specific stock 
// and gives traders an overall impression over the future security prices, helping them decide 
// the best move. A change in the indicator gives information about future trends a stock could 
// adopt, information about a sector or even on the whole economy. The financial sector is the 
// most relevant department of the economy and the indicators provide information on its overall 
// health, so when a stock price moves upwards, the indicators are a signal of good news. On the 
// other hand, if the price of a particular stock decreases, that is because bad news about its 
// performance are out and they generate negative signals to the market, causing the price to go 
// downwards. One could state that the movement of the security prices and consequently, the movement 
// of the indicators are an overall evaluation of a country’s economic trend.
//
// 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


PI(Period) =>
    pos = 0.0
    xKPI = (close - close[Period]) * 100 / close[Period]
    pos := iff(xKPI > 0, 1,
              iff(xKPI < 0, -1, nz(pos[1], 0))) 
    pos

strategy(title="Combo Backtest 123 Reversal & Perfomance 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, "---- Perfomance index ----")
Period = input(14, minval=1)
reverse = input(false, title="Trade reverse")
posReversal123 = Reversal123(Length, KSmoothing, DLength, Level)
posPI = PI(Period)
pos = iff(posReversal123 == 1 and posPI == 1 , 1,
	   iff(posReversal123 == -1 and posPI == -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 )