Trend Trader Strategy with MACD
// This source code is subject to the terms of the Mozilla Public License 2.0 at https://mozilla.org/MPL/2.0/
// © melihtuna

//@version=1
strategy("Trend Trader Strategy with MACD", overlay=true)

// === Trend Trader Strategy ===
Length = input(21),
Multiplier = input(3, minval=1)
MacdControl = input(true, title="Control 'MACD Histogram is positive?' when Buy condition")
avgTR      = wma(atr(1), Length)
highestC   = highest(Length)
lowestC    = lowest(Length)
hiLimit = highestC[1]-(avgTR[1] * Multiplier)
loLimit = lowestC[1]+(avgTR[1] * Multiplier)
ret = iff(close > hiLimit and close > loLimit, hiLimit,
        iff(close < loLimit and close < hiLimit, loLimit, nz(ret[1], 0)))
pos =	iff(close > ret, 1,
	    iff(close < ret, -1, nz(pos[1], 0))) 
barcolor(pos == -1 ? red: pos == 1 ? green : blue )
plot(ret, color= blue , title="Trend Trader Strategy with MACD")

// === INPUT BACKTEST RANGE ===
FromMonth = input(defval = 1, title = "From Month", minval = 1, maxval = 12)
FromDay   = input(defval = 1, title = "From Day", minval = 1, maxval = 31)
FromYear  = input(defval = 2020, title = "From Year", minval = 2017)
ToMonth   = input(defval = 1, title = "To Month", minval = 1, maxval = 12)
ToDay     = input(defval = 1, title = "To Day", minval = 1, maxval = 31)
ToYear    = input(defval = 9999, title = "To Year", minval = 2017)

// === FUNCTION EXAMPLE ===
start     = timestamp(FromYear, FromMonth, FromDay, 00, 00)  // backtest start window
finish    = timestamp(ToYear, ToMonth, ToDay, 23, 59)        // backtest finish window
window()  => time >= start and time <= finish ? true : false // create function "within window of time"

// === MACD ===
[macdLine, signalLine, histLine] = macd(close, 12, 26, 9)
macdCond= MacdControl ? histLine[0] > 0 ? true : false : true

strategy.entry("BUY", strategy.long, when = window() and pos == 1 and macdCond)
strategy.entry("SELL", strategy.short, when = window() and pos == -1)


