Class for drawing OBV using ring buffer - MetaTrader 5 script | Forex indicator download - MT4/MT5 resources

The COBVOnRingBuffer class is designed to calculate the technical indicator On Balance Volume (OBV) ring buffer using the following algorithm.

 Class COBVOnRingBuffer: publicCArrayRing

title

 #include

Files of the COBVOnRingBuffer.mqh class must be placed in the IncOnRingBuffer folder that needs to be created in MQL5\Include\. Attached to the description are two files containing examples used by the classes in this folder. A file ring buffer of class . must also be in this folder.

 //--- Initialization method:
boolean initialization ( // return false if error, true if success integer period = 0 , // OBV period integer buffer size = 256 , // size of ring buffer boolean as_series = false // true if time series, otherwise - false );

OBV periods are used as follows: Integer : If the value is 0 (default), the indicator works like the one included in the terminal - calculations will be performed for all bars of the chart. If there are any other positive values, the value of each chart bar is calculated using the specified number of bars (moving average principle).

 //--- Calculation method based on time series or indicator buffer:
Integer MainOnArray( // Returns the number of elements processed constant integer rate_total, // size of the array constant integer previously calculated, // the number of elements processed on the last call constant double & price[], // price constant long & volume[]); // volume );

 //--- Calculation method based on individual elements of the array
Double the main value ( // returns the OBV value constant integer of the set element (bar) rate_total, // the size of the array constant integer previously calculated, // the processed array element constant integer start, // where the important data of the array begins
  c onst double the price, // price
  c Angst long volume, // volume
  c Angst integer index // element (column) index
  ) ;

 //--- Methods to access data:
Integer BarRequired(); // Returns the number of bars required to draw the indicator
string name(); // returns the name of the indicator
integer period (); // returns period
integer size(); // Returns the size of the ring buffer

Calculated data of the indicator can be obtained from the ring buffer just like from a usual array. For example:

//--- Class with OBV indicator calculation method:
#include COBVOnRingBuffer obv;

... //+----------------------------------------------------------------------------------+
//|Custom indicator iteration function |
//+------------------------------------------------------------------+
integer calculation ( const integer rate_total,
constant integer previously calculated,
const datetime &time[],
const double & open[],
const double &high[],
const double &low[],
const double &close[],
constant long &scale[],
const long &volume[],
const int & spread[])
  { //--- Indicator calculation based on time series: obv.MainOnArray(rates_total,prev_calculated,close,tick_volume);

... //--- use data from ring buffer "obv",
// For example, copy the data in the indicator buffer: for ( integer i = start;i  Stopped();i++)
      OBV_Buffer[i] = obv[rates_total- 1 -i]; // Indicator line ... //--- Return the prev_calculated value of the next call: return (rates_total);
  }

MT5 OBV MQL5 CodeBase Draw using ring buffer class script

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