Getting the Max and min price range for a chart ADX using MQL5

Question

I have tried the following:

adx_output = iADX(_Symbol,TimePeriod,Candles_for_adx);
Print(ChartGetDouble(0,CHART_PRICE_MAX,2));
Print(ChartGetDouble(0,CHART_PRICE_MIN,2));
Print(ChartGetDouble(0,CHART_POINTS_PER_BAR,2));

But the above code gives me the mid value for the current or tick based time series. I want to access the range for the previous candles. But could not find anything that can be helpful.
Please let me know the suggestion for this issue.

Answer 1

You do not check the right values

Well,
using MetaTrader's GUI Graph's attributes { CHART_PRICE_MIN, CHART_PRICE_MAX } is possible, yet the Graph's layout is controlled by aPriceDOMAIN events ( QUOTE-s ) and some configurable options, yet not by the ADX Technical Indicator values per-se, so such retrieved numbers, received from GUI-state, have almost nothing to do with the actually sought for { min, MAX }-ADX values.

Approach:

• a smart yet complicated approach would be to create a CustomIndicator or a class, doing this exact service.

• a naive but functional approach would be to check and re-check the desired iADX()-{ MAIN, +DI, -DI } values:

---

/* -----------------------------------------------//
int  iADX(                                        // MQL5-call-inteface:
           string           symbol,               //      symbol name
           ENUM_TIMEFRAMES  period,               //      period
           int              adx_period            //      averaging period
           );
*/

#define currentChartID         0
#define currentChartMainWINDOW 0

int    nBARsVISIBLE = ChartGetInteger( currentChartID, CHART_VISIBLE_BARS,
                                       currentChartMainWINDOW
                                       ); 
double iADX_VISIBLE[nBARsVISIBLE];
double iADX_VISIBLE_min,
       iADX_VISIBLE_MAX;
int    iADX_IndicatorHANDLE = iADX( _Symbol,
                                     TimePeriod,
                                     Candles_for_adx
                                     );
/* -----------------------------------------------//
int  CopyBuffer(                                  // MQL5-call-inteface:
                  int       indicator_handle,     // indicator handle
                  int       buffer_num,           // indicator buffer number
                  int       start_pos,            // start position
                  int       count,                // amount to copy
                  double    buffer[]              // target array to copy
                  );
*/
int RetCODE = CopyBuffer( iADX_IndicatorHANDLE,
                          MODE_MAIN,              // { 0: MODE_MAIN | 1: MODE_PLUSDI | 2: MODE_MINUSDI }
                          0,
                          nBARsVISIBLE,
                          iADX_VISIBLE
                          );
 if ( RetCODE == -1 ) {...}
 else {
       iADX_VISIBLE_min = iADX_VISIBLE[ ArrayMinimum( iADX_VISIBLE ) ];
       iADX_VISIBLE_MAX = iADX_VISIBLE[ ArrayMaximum( iADX_VISIBLE ) ];
       ...
 }

---

Given the last comment:

Well, this might be the answer to my question but sir, I want the graph limits not the ADX min max. I can calculate it later, but currently want to have the graph limits. I am trying some experiments with the ADX graph. – Jaffer Wilson 1 hour ago

   #define currentChartID          0       // adapt to fit your current setup
   #define currentChartSubWinID    0       // adapt to fit your current setup

   double priceMin = ChartGetDouble( currentChartID,
                                     CHART_PRICE_MIN,
                                     currentChartSubWinID
                                     );
   double priceMax = ChartGetDouble( currentChartID,
                                     CHART_PRICE_MAX,
                                     currentChartSubWinID
                                     );
   Print( "INF:: Chart(", currentChartID, ":", currentChartSubWinID, ").CHART_PRICE_MAX = ", priceMin );
   Print( "INF:: Chart(", currentChartID, ":", currentChartSubWinID, ").CHART_PRICE_MAX = ", priceMax );