# MACD (Moving Average Convergence/Divergence) – Trading view Pine script codes

MACD is an extremely popular indicator used in technical analysis. MACD can be used to identify aspects of a security’s overall trend. Most notably these aspects are momentum, as well as trend direction and duration. What makes MACD so informative is that it is actually the combination of two different types of indicators. First, MACD employs two Moving Averages of varying lengths (which are lagging indicators) to identify trend direction and duration. Then, MACD takes the difference in values between those two Moving Averages (MACD Line) and an EMA of those Moving Averages (Signal Line) and plots that difference between the two lines as a histogram which oscillates above and below a center Zero Line. The histogram is used as a good indication of a security’s momentum.

```// This source code is subject to the terms of the Mozilla Public License 2.0 at https://mozilla.org/MPL/2.0/

//@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-(avgTR * Multiplier)
loLimit = lowestC+(avgTR * Multiplier)
ret = iff(close > hiLimit and close > loLimit, hiLimit,
iff(close < loLimit and close < hiLimit, loLimit, nz(ret, 0)))
pos =	iff(close > ret, 1,
iff(close < ret, -1, nz(pos, 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 ? 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)
```