//@version=4
strategy(title="Demo with auto strike price", shorttitle="Demo with auto strike price" , overlay=true)
tradeType = input("BOTH", title="Choose Trade Type : ", options=["LONG", "SHORT", "BOTH", "NONE"])
_1 = input(true,"══════════ Syntax ══════════")
tt = input("BUY", "Transition_Type", options=["BUY", "SELL"])
ts = input("NIFTY", "Buy Call Symbol", input.string)
ts_1 = input("NIFTY", "Buy PUT Symbol", input.string)
qty = input("75", "Quantity Value", input.string)

_isBarInSession(sess) =>
    t = time("1", sess)
    na(t[1]) and not na(t) or t[1] < t
closeTimeInput = input(title="Intraday_Auto_Close :", type=input.session, defval="1430-1500")
useCloseTime = input(title="Intraday_Auto_Close | ON/OFF", defval=true)
closeTime = _isBarInSession(closeTimeInput)
sessCloseCond = useCloseTime ? closeTime and not closeTime[1] : false

_2 = input(true,"══════════ Back_Testing ══════════")
startDate = input(title="Start Date", type=input.integer, defval=22, minval=1, maxval=31)
startMonth = input(title="Start Month", type=input.integer, defval=3, minval=1, maxval=12)
startYear = input(title="Start Year", type=input.integer, defval=2021, minval=1800, maxval=2100)

endDate = input(title="End Date", type=input.integer, defval=31, minval=1, maxval=31)
endMonth = input(title="End Month", type=input.integer, defval=12, minval=1, maxval=12)
endYear = input(title="End Year", type=input.integer, defval=2021, minval=1800, maxval=2100)
     
inDateRange = (time >= timestamp(syminfo.timezone, startYear, startMonth, startDate, 0, 0)) and (time < timestamp(syminfo.timezone, endYear, endMonth, endDate, 0, 0))

//Message alert inputs
Buy_Call = '[{"TT":"'+ tt +'","E":"NFO","TS":"'+ ts +'{' +tostring(close) +'}CE","Q":"'+ qty +'","OT":"MARKET","P":"INTRADAY","VL":"DAY","NEAR":"50","CAL":"+500","AT":"ZERODHA"}]'

Buy_Put = '[{"TT":"'+ tt +'","E":"NFO","TS":"'+ ts_1 +'{' +tostring(close) +'}PE","Q":"'+ qty +'","OT":"MARKET","P":"INTRADAY","VL":"DAY","NEAR":"50","CAL":"-500","AT":"ZERODHA"}]'
     
Exit_Call = '[{"AS":"NIFTY21MAR","E":"NFO","P":"MIS","AT":"ZERODHA"}]'

Exit_Put = '[{"AS":"NIFTY21MAR","E":"NFO","P":"MIS","AT":"ZERODHA"}]'

long = close > open
short = close < open


if inDateRange and tradeType != "NONE"
    strategy.entry("long", strategy.long, when=long == true and tradeType != "SHORT",alert_message=Buy_Call)
    strategy.entry("short", strategy.short, when=short == true and tradeType != "LONG",alert_message=Buy_Put)
    strategy.close("long", when=short == true and tradeType == "LONG" ,alert_message=Exit_Call)
    strategy.close("short", when=long == true and tradeType == "SHORT" ,alert_message=Exit_Put)

if (not inDateRange)
    strategy.close_all()
strategy.close_all(when=sessCloseCond)