Error creating indicator instance over SAR handle!!

[fernandovm]

Dear,

As we know, we can instantiate some indicators on other indicators. As an example, we can choose the DEMA indicator, its documentation (https://www.mql5.com/en/docs/indicators/idema) says:

applied_price

[in]  The price used. Can be any of the price constants ENUM_APPLIED_PRICE or a handle of another indicator.

I tested a lot of indicators that worked correctly, but any indicator I try to pass a SAR handle (previously generated by the iSAR method) fails with error 4804.

ERR_INDICATOR_CANNOT_APPLY

4804

The indicator cannot be applied to another indicator

But again, this so happens just with SAR. As an example, I can create the DEMA over the MA, but I can't create it over the SAR.

   int hnd1 = iSAR(_Symbol, PERIOD_M1, 5, 20);
   int hnd2 = iMA(_Symbol, PERIOD_M1, 5, 2, MODE_SMA, PRICE_CLOSE);
   
   if (iDEMA(_Symbol, PERIOD_M1, 9, 5, hnd1) ==  INVALID_HANDLE)
      Print("Error creating DEMA handler over iSAR handler.");

   if (iDEMA(_Symbol, PERIOD_M1, 9, 5, hnd2) ==  INVALID_HANDLE)
      Print("Error creating DEMA handler over iMA handler.");

I receive "Error creating DEMA handler over iSAR handler". 

Somebody would know explain why happens with SAR?

Best regards!