EMA Difference Mapping with Trades

//@version=4
strategy(title="EMA Difference Mapping with Trades", shorttitle="EMA Diff Map", overlay=false)
// Inputs
emaLength = input(20, "EMA Length")
stdDevLength = input(2, "Standard Deviation Length")
priceSource = close
takeProfitPoints = input(1000, title="Take Profit (in Points)")
stopLossPoints = input(2500, title="Stop Loss (in Points)")
// Calculate EMA
ema = ema(priceSource, emaLength)
// Calculate Standard Deviation
stdDev = stdev(priceSource, stdDevLength)
// Calculate differences
diff1 = (ema + stdDev) - ema
diff2 = ema - (ema - stdDev)
// Calculate min and max differences from last year
lookbackPeriod = 504 // Number of trading days in a year
minDiff1 = lowest(diff1, lookbackPeriod)
maxDiff1 = highest(diff1, lookbackPeriod)
minDiff2 = lowest(diff2, lookbackPeriod)
maxDiff2 = highest(diff2, lookbackPeriod)
// Map differences based on requirements
mappedDiff1 = 50 + 50 * ((diff1 - minDiff1) / (maxDiff1 - minDiff1))
mappedDiff2 = 50 - 50 * ((diff2 - minDiff2) / (maxDiff2 - minDiff2))
// Combine mapped differences into a single line
mappedLine = if close > ema
    mappedDiff1
else
    mappedDiff2
// Plot 'mappedLine' in the main chart area conditionally
plot(mappedLine, title="EMA Difference Mapping", color=(close > ema ? color.blue : na), style=plot.style_line, linewidth=2)
// Calculate the 50EMA and 200SMA
ema50 = ema(close, 50)
sma200 = sma(close, 200)
// Plot the 50EMA and 200SMA on the main chart
plot(ema50, color=color.blue, title="50 SMA", linewidth=2)
plot(sma200, color=color.red, title="200 SMA", linewidth=2)
// Initialize trade variables
var bool waitingForBuy = na
var bool waitingForSell = na
var bool buyConditionMet = false
var bool sellConditionMet = false
if not sellConditionMet and crossunder(ema50, sma200)
    sellConditionMet := true
    waitingForBuy := false
if sellConditionMet 
    waitingForSell := true
    sellConditionMet := false
if waitingForSell and close < sma200 and mappedLine > 75
    strategy.entry("Sell", strategy.short)
    strategy.exit("Sell Exit", "Sell", profit=takeProfitPoints, loss=stopLossPoints)
    waitingForSell := false
// Define the strategy conditions and execute trades
if not buyConditionMet  and crossover(ema50, sma200)
    buyConditionMet := true
    waitingForSell := false
if buyConditionMet 
    waitingForBuy := true
    buyConditionMet := false
if waitingForBuy and close > sma200 and mappedLine < 25
    strategy.entry("Buy", strategy.long)
    strategy.exit("Buy Exit", "Buy", profit=takeProfitPoints, loss=stopLossPoints)
    waitingForBuy := false
Expand (81 lines)