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/*backtest
start: 2019-12-23 08:00:00
end: 2024-12-10 08:00:00
period: 1d
basePeriod: 1d
exchanges: [{"eid":"Futures_Binance","currency":"BTC_USDT"}]
*/

//@version=5
strategy("RSI and MACD by Karthik", overlay=true)

// Define periods for SMAs
sma50Period = 50
sma200Period = 200

// Calculate SMAs
sma50 = ta.sma(close, sma50Period)
sma200 = ta.sma(close, sma200Period)

// Plot SMAs on the main chart
plot(sma50, color=color.blue, title="50 Period SMA", linewidth=2)
plot(sma200, color=color.red, title="200 Period SMA", linewidth=2)

// Define and calculate parameters for Stochastic RSI
stochRSIPeriod = 14
rsi = ta.rsi(close, stochRSIPeriod)
stochRSIK = ta.stoch(rsi, rsi, stochRSIPeriod, 3)
stochRSID = ta.sma(stochRSIK, 3)

// Define and calculate parameters for MACD
macdShort = 12
macdLong = 26
macdSignal = 9
[macdLine, signalLine, macdHist] = ta.macd(close, macdShort, macdLong, macdSignal)

// Plot Stochastic RSI in a separate pane
hline(80, "Overbought", color=color.red, linewidth=1)
hline(20, "Oversold", color=color.green, linewidth=1)
plot(stochRSIK, color=color.blue, title="Stochastic RSI %K")
plot(stochRSID, color=color.red, title="Stochastic RSI %D")

// Plot MACD in a separate pane
hline(0, "Zero Line", color=color.gray, linewidth=1)
plot(macdHist, color=color.blue, title="MACD Histogram", style=plot.style_histogram)
plot(macdLine, color=color.red, title="MACD Line")
plot(signalLine, color=color.green, title="Signal Line")

// Conditions for buy and sell signals
isAbove200SMA = close > sma200
isStochRSIKAbove = stochRSIK > stochRSID
macdLineAbove = macdLine > signalLine
buySignal = isAbove200SMA and isStochRSIKAbove and macdLineAbove

isBelow200SMA = close < sma200
isStochRSIKBelow = stochRSIK < stochRSID
macdLineBelow = macdLine < signalLine
sellSignal = isBelow200SMA and isStochRSIKBelow and macdLineBelow

// Track the last signal with explicit type declaration
var string lastSignal = na

// Create series for plotting conditions
var bool plotBuySignal = na
var bool plotSellSignal = na
var bool plotExitBuySignal = na
var bool plotExitSellSignal = na

// Update plotting conditions based on signal and last signal
if buySignal and (lastSignal != "buy")
    plotBuySignal := true
    lastSignal := "buy"
else
    plotBuySignal := na

if sellSignal and (lastSignal != "sell")
    plotSellSignal := true
    lastSignal := "sell"
else
    plotSellSignal := na

// Update exit conditions based on SMA50
if lastSignal == "buy" and close < sma50
    plotExitBuySignal := true
    lastSignal := na // Clear lastSignal after exit
else
    plotExitBuySignal := na

if lastSignal == "sell" and close > sma50
    plotExitSellSignal := true
    lastSignal := na // Clear lastSignal after exit
else
    plotExitSellSignal := na

// Plot buy and sell signals on the main chart
plotshape(series=plotBuySignal, location=location.belowbar, color=color.green, style=shape.circle, size=size.small, title="Buy Signal")
plotshape(series=plotSellSignal, location=location.abovebar, color=color.red, style=shape.circle, size=size.small, title="Sell Signal")

// Plot exit signals for buy and sell
plotshape(series=plotExitBuySignal, location=location.belowbar, color=color.yellow, style=shape.xcross, size=size.small, title="Exit Buy Signal")
plotshape(series=plotExitSellSignal, location=location.abovebar, color=color.yellow, style=shape.xcross, size=size.small, title="Exit Sell Signal")


// Strategy to Backtest

long = buySignal
short = sellSignal

// Exit Conditions
exitBuy = close < sma50
exitSell = close > sma50


if (buySignal)
    strategy.entry("Long", strategy.long, 1.0)
if (sellSignal)
    strategy.entry("Short", strategy.short, 1.0)

strategy.close("Long", when=exitBuy)
strategy.close("Short", when=exitSell)