MT4 Supply and Demand Area Indicator Download | Forex Indicator Download - MetaTrader 4 Resources - MetaTrader 4 Resources

 //+------------------------------------------------------------------+
 //|Supply and demand area indicators- core implementation|
 //|all rights reservedTradingFinder.com - 2023-2025 |
 //+------------------------------------------------------------------+

 // Structure to store area information
struct   Blocks   {
 datetime   BlockStartTime ;    // Zone start time
 int        BlockType ;         // 1=support level，2=resistance level
double     BlockHigh ;         // price ceiling
double     BlockLow ;          // lower price level
datetime   BlockEndTime ;      // When a zone fails
bool       BlockTouched ;      // Zone retested
color      BlockColor ;        // Visual color
 } ;

 // Main input parameters（Simplified）
 input   bool    ShowSupport      =   true ;           // Show support area
input   bool    ShowResistance   =   true ;           // Show resistance zone
input   color   ColorSupport     =   C '34,177,76' ;   // Support color
 input   color   ColorResist      =   C '237,28,36' ;   // Resistance color

 // Global variables
Blocks   blocks [ ] ;
 datetime   Level2Time [ ] ;    //Market structure point
 double     Level2Price [ ] ;   // Price of structure point

 //+------------------------------------------------------------------+
 //|Check if a new candle has formed or if the chart has moved|
 //+------------------------------------------------------------------+
 bool   Timer1Check ( )   {
 static   datetime   Timer1   =   0 ;
 if ( Timer1 == 0   ||   Timer1 != iTime ( Symbol ( ) , PERIOD_CURRENT , 0 ) )   {
 Timer1   =   iTime ( Symbol ( ) , PERIOD_CURRENT , 0 ) ;
 return   true ;
 }
 return   false ;
 }

 //+------------------------------------------------------------------+
 //|Create new areas based on market structure points|
 //+------------------------------------------------------------------+
 void   CreateNewBlock ( int   index ,   int   structPoint )   {
 blocks [ index ] .BlockStartTime​   =   Level2Time [ structPoint ] ;
 blocks [ index ] .BlockEndTime​   =   D '2030.12.31' ;   //Default end time (far in the future)

 // Determine support or resistance based on price action
 if ( Level2Price [ structPoint ]   <   Level2Price [ structPoint -1 ] )
 blocks [ index ] .BlockType​   =   1 ;   // Support zone
 else
 blocks [ index ] .BlockType​   =   2 ;   // Resistance zone

int   candle   =   iBarShift ( Symbol ( ) , PERIOD_CURRENT , Level2Time [ structPoint ] ) ;

 //Set price level based on type
 if ( blocks [ index ] . BlockType   ==   1 )   {
 blocks [ index ] .BlockLow​   =   iLow ( Symbol ( ) , PERIOD_CURRENT , candle ) ;
 blocks [ index ] .BlockHigh​   =   MathMax ( iOpen ( Symbol ( ) , PERIOD_CURRENT , candle ) ,
 iClose ( Symbol ( ) , PERIOD_CURRENT , candle ) ) ;
 blocks [ index ] .BlockColor​   =   ColorSupport ;
 }   else   {
 blocks [ index ] .BlockHigh​   =   iHigh ( Symbol ( ) , PERIOD_CURRENT , candle ) ;
 blocks [ index ] .BlockLow​   =   MathMin ( iOpen ( Symbol ( ) , PERIOD_CURRENT , candle ) ,
 iClose ( Symbol ( ) , PERIOD_CURRENT , candle ) ) ;
 blocks [ index ] .BlockColor​   =   ColorResist ;
 }

 // Create a visible rectangle for the area
 string   name   =   "Zone-"   +   TimeToString ( blocks [ index ] . BlockStartTime ) ;
RectangleCreate ( 0 ,   name ,   0 ,
 blocks [ index ] . BlockStartTime ,   blocks [ index ] . BlockLow ,
 blocks [ index ] . BlockEndTime ,   blocks [ index ] . BlockHigh ,
 blocks [ index ] . BlockColor ,   STYLE_SOLID ,   1 ,   true ) ;
 }

 //+------------------------------------------------------------------+
 //|Check if the area has been touched or invalidated|
 //+------------------------------------------------------------------+
 void   CheckZoneStatus ( int   zoneIndex )   {
 // Implementation details...
 // 1. Check if the price deviates from the zone
 // 2. Check if the price returns to test the area
 // 3. Check if the price breaks out (invalidate the zone)
 }

 //+------------------------------------------------------------------+
 //|Main function-identify and update areas|
 //+------------------------------------------------------------------+
 void   Main ( )   {
 // Get market structure points (simplified)
 GetMarketStructure ( Level2Time ,   Level2Price ) ;

 // Process each structure point
 for ( int   i = 0 ;   i < ArraySize ( Level2Time ) ;   i ++ )   {
 // Check if there is already an area at this point
 bool   exists   =   false ;
 for ( int   j = 0 ;   j < ArraySize ( blocks ) ;   j ++ )   {
 if ( Level2Time [ i ]   ==   blocks [ j ] . BlockStartTime )   {
 exists   =   true ;
break ;
 }
 }

 // If you need to create a new area
 if ( ! exists )   {
 int   index   =   ArraySize ( blocks ) ;
 ArrayResize ( blocks ,   index + 1 ) ;
 CreateNewBlock ( index ,   i ) ;
 }
 }

 // Update the status of an existing region
 for ( int   i = 0 ;   i < ArraySize ( blocks ) ;   i ++ )   {
 CheckZoneStatus ( i ) ;
 }
 }