Calculated EMA seems not accurately

[redstrike]

I am trying to calculate EMA and SMA of the same data values. However, the result is the same.
When comparing to TradingView's calculated EMA, it's not matched.

[juanvisoler]

Same for MACD

[juanvisoler]

Probably because it's using EMA by default

[juanvisoler]

@redstrike EMA looks correct. Depending on the parameters they can yield the same results or not.

Look at this example:

const SMA = require('technicalindicators').SMA
let period = 3;
let values = [1.5554, 1.5555, 1.5558,1.5560];
SMA.calculate({period : period, values : values})

const EMA = require('technicalindicators').EMA
let period = 3;
let values = [1.5554, 1.5555, 1.5558,1.5560];
EMA.calculate({period : period, values : values})

[redstrike]

@juanvisoler I did an EMA calculation with a larger dataset before trying the above simple example and compare it with other true sources such as TradingView, and believe that EMA result is not accurate.

[juanvisoler]

@redstrike can you give an example?

[redstrike]

finmath's EMA result is more accurate as expected.
Also, I compare the result with TradingView's calculated result, so I want to report this issue.
If you believe that technicalindicators' EMA result is correct, then I have no more comment.

[southwhale]

我用EMA计算的结果也是有问题哎

[southwhale]

我用EMA计算的结果也是有问题哎

是我错了，当数据量较小时计算结果似乎不正确，但当数据量足够大时是没问题的，这个库非常棒

[southwhale]

我用EMA计算的结果也是有问题哎

是我错了，当数据量较小时计算结果似乎不正确，但当数据量足够大时是没问题的，这个库非常棒

唯一的遗憾是只能nextValue不能updateCurrentValue

[saru2020]

@anandanand84 can you please look into this issue please?
looks like this is what's causing the issue in MACD(EMA based) as mentioned here: #249 (comment)

[egranville]

Also comparing it to TradingView's EMA and seems incorrect