EMA always return 0.00

[Chipsterjulien]

Hello, i used your code with data and ... nothing works. For example EMA always gives 0

Volume:	870.19 Time:	2021-11-28T07:00:00 -> 2021-11-28T08:00:00
Open:	54377.42
Close:	54475.96
High:	54590.48
Low:	54173.81
Volume:	787.07 Time:	2021-11-28T08:00:00 -> 2021-11-28T09:00:00
Open:	54475.97
Close:	54515.61
High:	54636.65
Low:	54396.33
Volume:	985.20 Time:	2021-11-28T09:00:00 -> 2021-11-28T10:00:00
Open:	54515.60
Close:	54396.20
High:	54682.90
Low:	54231.92
Volume:	823.84 Time:	2021-11-28T10:00:00 -> 2021-11-28T11:00:00
Open:	54393.87
Close:	54335.80
High:	54475.00
Low:	54130.72
Volume:	765.69 Time:	2021-11-28T11:00:00 -> 2021-11-28T12:00:00
Open:	54335.80
Close:	54718.15
High:	54933.80
Low:	54184.60
Volume:	1028.53 Time:	2021-11-28T12:00:00 -> 2021-11-28T13:00:00
Open:	54718.15
Close:	54493.09
High:	54875.00
Low:	54425.27
Volume:	1030.39 Time:	2021-11-28T13:00:00 -> 2021-11-28T14:00:00
Open:	54493.10
Close:	54356.62
High:	54635.52
Low:	54263.16
Volume:	909.93 Time:	2021-11-28T14:00:00 -> 2021-11-28T15:00:00
Open:	54356.62
Close:	54274.20
High:	54396.33
Low:	54203.13
Volume:	777.66 Time:	2021-11-28T15:00:00 -> 2021-11-28T16:00:00
Open:	54274.20
Close:	54365.00
High:	54555.00
Low:	54029.99
Volume:	1130.34 Time:	2021-11-28T16:00:00 -> 2021-11-28T17:00:00
Open:	54365.00
Close:	54296.14
High:	54450.00
Low:	54169.84
Volume:	753.77 Time:	2021-11-28T17:00:00 -> 2021-11-28T18:00:00
Open:	54296.14
Close:	54188.43
High:	54373.00
Low:	53942.01
Volume:	1277.10 Time:	2021-11-28T18:00:00 -> 2021-11-28T19:00:00
Open:	54188.43
Close:	53896.37
High:	54287.25
Low:	53800.00
Volume:	1358.34 Time:	2021-11-28T19:00:00 -> 2021-11-28T20:00:00
Open:	53896.36
Close:	54108.99
High:	54186.17
Low:	53256.64
Volume:	2958.13 Time:	2021-11-28T20:00:00 -> 2021-11-28T21:00:00
Open:	54108.99
Close:	54617.85
High:	54967.50
Low:	54044.98
Volume:	2249.23 Time:	2021-11-28T21:00:00 -> 2021-11-28T22:00:00
Open:	54617.85
Close:	54918.51
High:	55149.99
Low:	54617.84
Volume:	1304.77 Time:	2021-11-28T22:00:00 -> 2021-11-28T23:00:00
Open:	54918.51
Close:	56273.23
High:	56390.00
Low:	54863.01
Volume:	3117.97 Time:	2021-11-28T23:00:00 -> 2021-11-29T00:00:00
Open:	56273.23
Close:	56029.82
High:	56729.72
Low:	56023.01
Volume:	2427.77 Time:	2021-11-29T00:00:00 -> 2021-11-29T01:00:00
Open:	56029.81
Close:	57274.88
High:	57445.05
Low:	56000.00
Volume:	3468.79 Time:	2021-11-29T01:00:00 -> 2021-11-29T02:00:00
Open:	57274.89
Close:	57765.73
High:	58000.15
Low:	57136.56
Volume:	3073.53 Time:	2021-11-29T02:00:00 -> 2021-11-29T03:00:00
Open:	57765.73
Close:	57639.76
High:	58242.09
Low:	57501.99
Volume:	2729.83 Time:	2021-11-29T03:00:00 -> 2021-11-29T04:00:00
Open:	57643.14
Close:	57309.25
High:	57715.42
Low:	57269.72
Volume:	1769.15 Time:	2021-11-29T04:00:00 -> 2021-11-29T05:00:00
Open:	57309.26
Close:	57359.02
High:	57426.95
Low:	57176.00
Volume:	1648.18 Time:	2021-11-29T05:00:00 -> 2021-11-29T06:00:00
Open:	57359.02
Close:	57249.58
High:	57642.93
Low:	57232.00
Volume:	1358.98 Time:	2021-11-29T06:00:00 -> 2021-11-29T07:00:00
Open:	57249.58
Close:	57325.75
High:	57384.99
Low:	57200.00
Volume:	801.75 Time:	2021-11-29T07:00:00 -> 2021-11-29T08:00:00
Open:	57325.76
Close:	57426.91
High:	57500.63
Low:	57309.65
Volume:	1002.85 Time:	2021-11-29T08:00:00 -> 2021-11-29T09:00:00
Open:	57426.92
Close:	57515.13
High:	57688.00
Low:	57390.00
Volume:	1047.27 Time:	2021-11-29T09:00:00 -> 2021-11-29T10:00:00
Open:	57512.17
Close:	57514.33
High:	57642.85
Low:	57455.08
Volume:	174.91]}

EMA output: 0.00

The code :

df := techan.NewTimeSeries()

	for _, k := range *klines {
		// opentime, open, high, low, close, volume
		period := techan.NewTimePeriod(time.Unix(k.OpenTime/1000, 0), *duration)

		candle := techan.NewCandle(period)
		candle.OpenPrice = big.NewFromString(k.Open)
		candle.ClosePrice = big.NewFromString(k.Close)
		candle.MaxPrice = big.NewFromString(k.High)
		candle.MinPrice = big.NewFromString(k.Low)
		candle.Volume = big.NewFromString(k.Volume)

		df.AddCandle(candle)
	}

	fmt.Println(df)
        closePrices := techan.NewClosePriceIndicator(df)
	movingAverage := techan.NewEMAIndicator(closePrices, 10) // Create an exponential moving average with a window of 10

	fmt.Println("EMA output :" + movingAverage.Calculate(0).FormattedString(2))

[d2bit]

@Chipsterjulien Hi!
I think the problem is in el Calculate call, as the window size is 10, the Calculate will return 0 from index 0 up to 9, as it has not enough data to fill the window.
Try this:

movingAverage.Calculate(9).FormattedString(2)

If it does not work, take a look if you are adding the candles right. Seems they have to be added time-ordered.

[gespi1]

@Chipsterjulien did you ever get this working?