I am trying to replicate TradingView’s Relative Moving Average (RMA) in Amibroker but the plotted values of RMA differ widely with TradingView’s. Here is my AFL script:

_SECTION_BEGIN("Relative Moving Average");
function RMA(source, period)
{
    alpha = 1 / period;
    total = 0.0;
    total += alpha * source + (1 - alpha) * Nz(Ref(total, - 1));
    
    return total;
}

average = RMA(close, 10);
plot(average, "RMA", colorBlack, styleLine);
_SECTION_END();


rma = RMA(close, 10);
plot(rma, "RMA", colorBlack, styleLine);

The same function in the below PineScript fetches correct results:

rma(source, length) =>
    alpha = 1 / length
    sum = 0.0
    sum := alpha * source + (1 - alpha) * nz(sum[1])
plot(Close, 10)

Amibroker’s results differ widely. With total = 0.0; the plotted values are 1/10th of Close. I have tried initializing total as total = EMA(source, period); but it just plots double the values of EMA. However, when I don’t use the compound operator += the values are approximately equal to EMA. Where am I doing it wrong?