Can somebody explain me what is the difference between both **`shift`** parameters of the `iMA` function on an example?  
 According to the `MQL4` documentation:

> 
> **`ma_shift`** - Moving Average shift. Indicators line offset relate to the chart by timeframe.
> 
> 
> **`shift`** - Index of the value taken from the indicator buffer
>  ( shift relative to the current bar the given amount of periods ago )
> 
> 
> 

Which parameters are taken by the standard MA indicator?