AMRS_LongOnly_PartTimer.pine

Script Name: AMRS_LongOnly_PartTimer
Author: ThePartTimeNSE
Description: This Script is created to back-test the data starting 01/01/2000 based on AMRS strategy.

AMRS is long only strategy. It is based on unique calculation around moving averages and 2 year high price.

There are few strategies for moving average crossovers but AMRS strategy is unique compared to other moving averages strategies as it has very specific below mentioned...
PineScript code:

Pine Script™ strategy
AMRS_LongOnly_PartTimer
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// This source code is subject to the terms of the Mozilla Public License 2.0 at https://mozilla.org/MPL/2.0/
// © Part Timer
//This script accepts from and to date parameter for backtesting. 
//This script generates white arrow for each buying signal
//@version=4
strategy("AMRS_LongOnly_PartTimer", overlay = true)
//i_endTime = input(defval = timestamp("02 Jun 2021 15:30 +0000"), title = "End Time", type=input.time)
StartYear=input(defval = 2000, title ="Start Year", type=input.integer)
StartMonth=input(defval = 01, title ="Start Month", type=input.integer)
StartDate=input(defval = 01, title ="Start Date", type=input.integer)
endYear=input(defval = 2021, title ="End Year", type=input.integer)
endMonth=input(defval = 06, title ="End Month", type=input.integer)
endDate=input(defval = 03, title ="End Date", type=input.integer)
ema11=ema(close,11)
ema13=ema(close,13)
ema21=ema(close,21)
afterStartDate = (time >= timestamp(syminfo.timezone,StartYear, StartMonth, StartDate, 0, 0))
//g=bar_index==1
//ath()=>
    //a=0.0
    //a:=g ? high : high>a[1] ? high:a[1]
    
//a = security(syminfo.tickerid, 'M', ath(),lookahead=barmerge.lookahead_on)
newHigh = (high > highest(high,504)[1])
//plot down arrows whenever it's a new high
plotshape(newHigh, style=shape.triangleup, location=location.abovebar, color=color.green, size=size.tiny)
b=highest(high,504)[1]
VarChk=((b-ema13)/b)*100
TrigLow = (low <= ema13) and (low >= ema21) and (VarChk <= 10)
plotshape(TrigLow, style=shape.triangleup, location=location.belowbar, color=color.white, size=size.tiny)
ExitPrice=(ema21 - (ema21*0.05))
DrawPrice=(b - (b*0.20))
stopprice=0.0
if (close <= ExitPrice)
    stopprice := ExitPrice
if (close <= DrawPrice)
    stopprice := DrawPrice
if (TrigLow and afterStartDate)
    strategy.entry("Long", strategy.long)
strategy.exit("exit","Long", stop=stopprice)
//beforeEndDate = (time < i_endTime)
beforeEndDate = (time >= timestamp(syminfo.timezone,endYear, endMonth, endDate, 0, 0))
if (beforeEndDate)
    strategy.close_all()
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