Different EMA readings with different data providers

[tkaboris]

HI can you please advice why EMA reaings of 400 is so different between data providers.
first image if from APEX market replay and second one is from IntentionalTrader data provider. As you see price candels are the same but EMAs are different
Using 5000 tick charts on NQ


and another screenshot from intentional Trader (data provider of tick data)

[tkaboris]

HI I see two screenshots in first post.

I am not calling Addchartindicator, only plotting manually
in strategy i have
ema400 = EMA(Close, 400);

Both NT version 8130

I am using market replaly from APEX and market replay from Intentional Trader data distributor and have these especially 400 EMAs readings diffrent



and another screenshot from

[tkaboris]

Thank you
I notice that it matters how many days you load in data series. On one NT there was 3 days and on another there was 5 days. And I guess it needs to be the same because for larger EMAs periods, if days or fewer then ema readings doesnt get to catch up.
is this correct observation?