Media móvil exponencial (EMA)

//@version=6
indicator("Exponential Moving Average (EMA)", overlay=true)
fastLen = input.int(12, "Fast EMA")
slowLen = input.int(26, "Slow EMA")
fast = ta.ema(close, fastLen)
slow = ta.ema(close, slowLen)
bullish = ta.crossover(fast, slow)
bearish = ta.crossunder(fast, slow)
plotshape(bullish, style=shape.triangleup,   location=location.belowbar, color=color.green, size=size.small, title="Buy")
plotshape(bearish, style=shape.triangledown, location=location.abovebar, color=color.red,   size=size.small, title="Sell")
plot(fast, "EMA Fast", color=color.aqua)
plot(slow, "EMA Slow", color=color.orange)

input fastLength = 12;
input slowLength = 26;
def fastEMA = ExpAverage(close, fastLength);
def slowEMA = ExpAverage(close, slowLength);
def buySignal = fastEMA crosses above slowEMA;
def sellSignal = fastEMA crosses below slowEMA;
AddOrder(OrderType.BUY_AUTO, buySignal, close, 1, Color.GREEN, Color.GREEN, "EMA Buy");
AddOrder(OrderType.SELL_AUTO, sellSignal, close, 1, Color.RED, Color.RED, "EMA Exit");
plot FastLine = fastEMA;
FastLine.SetDefaultColor(Color.CYAN);
plot SlowLine = slowEMA;
SlowLine.SetDefaultColor(Color.ORANGE);