import "github.com/MicahParks/go-ma"

// Create a logger.
logger := log.New(os.Stdout, "", 0)

// Gather some data.
//
// For production systems, it'd be best to gather data asynchronously.
prices := testData()

// Create the MACD and signal EMA pair.
signal := ma.DefaultMACDSignal(prices[:ma.RequiredSamplesForDefaultMACDSignal])

// Iterate through the rest of the data and print the results.
var results ma.MACDSignalResults
for i, p := range prices[ma.RequiredSamplesForDefaultMACDSignal:] {
	results = signal.Calculate(p)

	// Interpret the buy signal.
	var buySignal string
	if results.BuySignal != nil {
		if *results.BuySignal {
			buySignal = "Buy, buy, buy!"
		} else {
			buySignal = "Sell, sell, sell!"
		}
	} else {
		buySignal = "Do nothing."
	}

	logger.Printf("Price index: %d\n  MACD: %.5f\n  Signal EMA: %.5f\n  Buy signal: %s", i+ma.RequiredSamplesForDefaultMACDSignal, results.MACD.Result, results.SignalEMA, buySignal)
}