// This source code is subject to the terms of the Mozilla Public License 2.0 at https://mozilla.org/MPL/2.0/
// © yashp1334

//@version=4

strategy("Bollinger Bands Strategy", overlay=true)
source = close
length = input(20, minval=1)
mult = input(2.0, minval=0.001, maxval=50)
basis = sma(source, length)
dev = mult * stdev(source, length)
upper = basis + dev
lower = basis - dev
buySignal = crossover(source, lower)
sellSignal = crossunder(source, upper)


offset = input(0, "Offset", type = input.integer, minval = -500, maxval = 500)
plot(basis, "Basis", color=#872323, offset = offset)
p1 = plot(upper, "Upper", color=color.teal, offset = offset)
p2 = plot(lower, "Lower", color=color.teal, offset = offset)
fill(p1, p2, title = "Background", color=#198787, transp=95)

//INTRADAY
s=input(title="INTRA DAY TRADE SESSION",type=input.session,defval="0915-1450")
st=time(timeframe.period,s)
e=input(title="END SESSION",type=input.session,defval="1515-1520")
et=time(timeframe.period,e)
quant=input(title="Trade Quantity",defval=1)

//adding stoploss and target option
ut=input(defval=false,title="USE TARGET")
us=input(defval=false,title="USE STOPLOSS")
tar=input(defval=10.0,title="TARGET IN RS")
stop=input(defval=7.0,title="STOP LOSS IN RS")
tar:=tar/syminfo.mintick
stop:=stop/syminfo.mintick

//setting automated alerts required by apibridge
lxse="TYPE: LX" + " :SYMBOL: " + syminfo.ticker + " :QTY: " + tostring(quant) + " :TYPE:SE " + " :SYMBOL: " + syminfo.ticker + " :QTY: " + tostring(quant)

sxle="TYPE: SX" + " :SYMBOL: " + syminfo.ticker + " :QTY: " + tostring(quant) + " :TYPE:LE " + " :SYMBOL: " + syminfo.ticker + " :QTY: " + tostring(quant)

le="TYPE:LE " + " :SYMBOL: " + syminfo.ticker + " :QTY: " + tostring(quant)

lx="TYPE:LX " + " :SYMBOL: " + syminfo.ticker + " :QTY: " + tostring(quant)

se="TYPE:SE " + " :SYMBOL: " + syminfo.ticker + " :QTY: " + tostring(quant)

sx="TYPE:SX " + " :SYMBOL: " + syminfo.ticker + " :QTY: " + tostring(quant)
if(buySignal and st and strategy.position_size==0)
    strategy.entry("BUY",strategy.long,comment=le)
if(sellSignal and st and strategy.position_size==0)
    strategy.entry("SELL",strategy.short,comment=se)
if(buySignal and st and strategy.position_size!=0)
    strategy.entry("BUY",strategy.long,comment=sxle)
if(sellSignal and st and strategy.position_size!=0)
    strategy.entry("SELL",strategy.short,comment=lxse)
    
if(ut==true and us==false)
    strategy.exit(id="LX",from_entry="BUY",profit=tar,comment=lx)
    strategy.exit(id="SX",from_entry="SELL",profit=tar,comment=sx)
if(us==true and ut==false)
    strategy.exit(id="LX",from_entry="BUY",loss=stop,comment=lx)
    strategy.exit(id="SX",from_entry="SELL",loss=stop,comment=sx)
    
if(ut==true and us==true)
    strategy.exit(id="LX",from_entry="BUY",profit=tar,loss=stop,comment=lx)
    strategy.exit(id="SX",from_entry="SELL",profit=tar,loss=stop,comment=sx)
strategy.close(id="BUY",when=et,comment=lx)
strategy.close(id="SELL",when=et,comment=sx)