GG 101

//@version=5
strategy("GG 101", overlay=true)

smalengt50 = 50
emalengt12 = 12
emalengt21 = 21

sma50 = ta.sma(close, 50)
ema12 = ta.ema(close, 12)
ema21 = ta.ema(close, 21)

// Declare stopLoss and takeProfit variables
var float stopLoss = na
var float takeProfit = na

// 1. Put these "na"s.
var line stopLossLine = na
var line takeProfitLine = na

// 2. Adding logic to manually reset or extend the lines based on if we are in a position or not.
if strategy.position_size == 0
    stopLossLine := na
    takeProfitLine := na
else
    stopLossLine.set_x2(bar_index)
    takeProfitLine.set_x2(bar_index)

longCondition = ta.crossover(ema12, ema21)
shortCondition = ta.crossunder(ema12, ema21)

if longCondition and strategy.position_size == 0
    stopLoss := close * (1 - 0.03)
    takeProfit := close * (1 + 0.03)

    // 3. Draw the start of the lines when we enter a position.
    stopLossLine := line.new(bar_index, stopLoss, bar_index, stopLoss, color=color.red)
    takeProfitLine := line.new(bar_index, takeProfit, bar_index, takeProfit, color=color.green)

    // Open a long position at market price
    strategy.entry("Long", strategy.long)

    // Set stop loss and take profit levels
    strategy.exit("Take Profit/Stop Loss", from_entry="Long", stop=stopLoss, limit=takeProfit)

if shortCondition and strategy.position_size == 0
    stopLoss := close * (1 + 0.03)
    takeProfit := close * (1 - 0.03)

    // 3. Draw the start of the lines when we enter a position.
    stopLossLine := line.new(bar_index, stopLoss, bar_index, stopLoss, color=color.red)
    takeProfitLine := line.new(bar_index, takeProfit, bar_index, takeProfit, color=color.green)

    // Open a short position at market price
    strategy.entry("Short", strategy.short)

    // Set stop loss and take profit levels
    strategy.exit("Take Profit/Stop Loss", from_entry="Short", stop=stopLoss, limit=takeProfit)

bandColor50 = sma50 < sma50[1] ? #ffa73c : color.rgb(33, 184, 243)
bandColor = ema12 > ema21 ? color.green : color.red
plot(ema12, color=bandColor)
plot(ema21, color=bandColor)
plot(sma50, color=bandColor50)