#include <iterator>
#include "decider.h"

macd_decider::macd_decider(std::size_t limit) 
    : prices(limit, .0), macd(limit, .0), signal(limit, .0), limit(limit) {}

void macd_decider::process(double price)
{
    count++;
    prices.add(price);
    macd.add(ema<double>(prices.begin(), prices.begin() + 12) - ema<double>(prices.begin(), prices.begin() + 26));
    signal.add(ema<double>(macd.begin(), macd.begin() + 9));
}

void macd_decider::reset(double price)
{
    prices = buffer<double>(limit, price); 
    signal = buffer<double>(limit, .0);
    macd   = buffer<double>(limit, .0);

    count = 0;
    start_price = price;
}