Xu,
You need to be a little careful if you use the EMA2 algorithm in
production situations. There is the ever present problem of machine
precision. For example:
(0.1&EMA -: 0.1&EMA2) i.100
1
(0.1&EMA -: 0.1&EMA2) i.1000
1
(0.1&EMA -: 0.1&EMA2) i.10000
0
Usually, where economists and forecasters dwell, they are looking at
20 years and precision is not usually an issue. Mais, guardez.
Mike Powell
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