MQL5: How do I calculate the upper and lower boundary values for an indicator window

[Sytze Visser]

Hi all

I use a MA(50) and also overlaid an RSI just to make use of the levels 90, 80, 50, 20 and 10. The signal line color of the RSI I make the same as the background color to make it "disappear". All I am interested in from the RSI is the levels. MA's levels function does not work.

In MQL5, is use the iMA function to determine the values for the past 50 candles. To convert the values to base 0 to 100, I use the formula in the loop (see code below).

This works fine, however, the top and bottom values for the 50 MA values are 0 and 100 (off course). But I'm trying to achieve exactly the same results as in the indicator window. The upper and lower values are not 100 and 0 for an MA(50). The can get pretty high, like 95+ or very low, but my calculated values different.

Can you tell me how I arrive at the same upper and lower values (red arrow) as in the attached screenshot? Either the real value or 100-based.

   double SMAto100Base(void)   
      {
         double         dSMA_Array[];
         double         dSMA_Base100_Array[];
         string         msg = "";
         double         dTotal;
         double         dMax;
         double         dMin;

         ArraySetAsSeries(dSMA_Array, false);
         CopyBuffer(iSMA_Def, 0, 0, iSMA_Period+1, dSMA_Array);

         dTotal = MathSum(dSMA_Array);
         MathRange(dSMA_Array, dMax, dMin);
         
         ArraySetAsSeries(dSMA_Base100_Array, false);
         ArrayResize(dSMA_Base100_Array,iSMA_Period+1);

         for( int i=iSMA_Period; i>=0; --i)
            {
               dSMA_Base100_Array[i] = ((dSMA_Array[i] - dMin) / ((dMax -dMin ) /100 ));
            }
         return dSMA_Array[0];
      }

[Vladimir Karputov]

Error (very serious error) - according to the MQL5 style, the indicator handle must be created ONCE and must be done in OnInit.

Correct it - until you correct this error, it is useless to move on.

[Sytze Visser]

Vladimir Karputov #:

Error (very serious error) - according to the MQL5 style, the indicator handle must be created ONCE and must be done in OnInit.

Correct it - until you correct this error, it is useless to move on.

Done. 

Question still remains. 

[Vladimir Karputov]

If you want to learn both iMA and iRSI in one window - see this option: RSIOnMAOnRSI

[Sytze Visser]

Hi Vadimir, interesting stuff. Let me play around with it.

[Sytze Visser]

Vladimir, your code is copyrighted? How can I use it?

[Vladimir Karputov]

Sytze Visser # :
Vladimir, your code is copyrighted? How can I use it?

CodeBase is free editable code.

[Carl Schreiber]

Sytze Visser #:
Vladimir, your code is copyrighted? How can I use it?

It is written in the terms:

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