Soho Williams VIX Fix

/**********************************************************************
* This is a Synthetic VIX indicator as described in the December 2007 *
* issue of "Active Trader" magazine.  The indicator is also named the *
* "Williams VIX Fix" since Larry Williams is credited with the        *
* formula's discovery.                                                *
*                                                                     *
* This indicator was coded by Matthew Ebersviller.                    * 
* and modified by sohocool the 07/01/2011   and 01/08/2015            *
* 08/17/2022 v1.3 -- pips4life.  Further improvements to on/off button code.
**********************************************************************/

#property indicator_separate_window
#property indicator_buffers 2
#property indicator_color1 clrBlue
#property indicator_width1 3
#property indicator_color2 clrRed
#property indicator_width2 2

extern int                VIX_Period            = 22;
extern int                FilterPeriod          = 5;
extern ENUM_APPLIED_PRICE PRICE                 = 3; //3=low
extern int                SignalPeriod          = 9;
extern ENUM_MA_METHOD     SignalMaMode          = 0;

extern string             button_note1_          = "------------------------------";
extern int                btn_Subwindow         = 0;                               // What window to put the button on.  If <0, the button will use the same sub-window as the indicator.
extern ENUM_BASE_CORNER   btn_corner            = CORNER_LEFT_UPPER;               // button corner on chart for anchoring
extern string             btn_text              = "VIXFIX";                        // a button name
extern string             btn_Font              = "Arial";                         // button font name
extern int                btn_FontSize          = 9;                               // button font size               
extern color              btn_text_ON_color     = clrLime;                         // ON color when the button is turned on
extern color              btn_text_OFF_color    = clrRed;                          // OFF color when the button is turned off
extern color              btn_background_color  = clrDimGray;                      // background color of the button
extern color              btn_border_color      = clrBlack;                        // border color the button
extern int                button_x              = 20;                              // x coordinate of the button     
extern int                button_y              = 25;                              // y coordinate of the button     
extern int                btn_Width             = 80;                              // button width
extern int                btn_Height            = 20;                              // button height

extern bool               Auto_Adjust_Window_Height = false;              // Opt. 'true' will auto-set a default sub-window size (which can be changed). However, MT4 might then behave strangely when manually adjusting the window height.
extern int                Default_Active_Window_Height = 250;            // Pick whatever you want to be your default sub-window height when the indicator is "on"

extern string             button_note2          = "------------------------------";

bool show_data;

int swin;
string IndicatorObjPrefix, buttonId;

double VixBuffer[],up[];

int OnInit()
{
      // код доступен только после оплаты
   }
   IndicatorDigits(Digits);

   string short_name;
   IndicatorBuffers(2);
   SetIndexStyle(0,DRAW_LINE);
   SetIndexStyle(1,DRAW_LINE);
   SetIndexBuffer(0,VixBuffer);
   SetIndexBuffer(1,up);

   short_name="SOHO_VIX_FIX_V1.30 ("+VIX_Period+")";

   IndicatorShortName(short_name);

   SetIndexLabel(0,short_name);
   SetIndexLabel(1,"Signal");

   SetIndexDrawBegin(0,VIX_Period);
   adjustWindowHeight();

   swin = ChartWindowFind(); // This is the real (sub-)window number for the indicator
   IndicatorObjPrefix = "_w" + IntegerToString(swin) + btn_text + "__"; // Including the swin is usually unique unless >2+ of THIS indy are displayed in the SAME sub-window (which will then require 'btn_text' to be unique!)

   if(btn_Subwindow<0) btn_Subwindow = swin;

   buttonId = "_" + IndicatorObjPrefix + "_BT_";
   if (ObjectFind(buttonId)<0)
   { 
      createButton(buttonId, btn_text, btn_Width, btn_Height, btn_Font, btn_FontSize, btn_background_color, btn_border_color, btn_text_ON_color);

      ObjectSetInteger(0,buttonId, OBJPROP_STATE,fal

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