EMA indicator is not displayed with periods about 400

[6677028]

I trade on TRADING STATION
The EMA indicator is not displayed with periods about 400.
If the periods is about 200, it is currently full. But big periods, It doesn't show full
Who can help me.
You can see picture

[Apprentice]

You need to zoom out or add more candles to the chart.

[6677028]

Dear @Apprentice
I zoomed out and I add an indicator. But I still can't see them. It's still just short.
Sorry, I don't understand what "add more candles to the chart" is like?

[Apprentice]

Add more historical candles to the chart.
To calculate 400 periods MA you need 400 + candles of that time frame on the chart.