Correct usage of SERIES_SYNCRONIZED?

[Tony]

Hi

In trying to prevent a divide by zero error, I realised that the indicator was calculating before the data was loaded or updated. I think I need to return without calculation if the data is not ready. I saw someone else use SeriesInfoInteger( NULL, 0, SERIES_SYNCRONIZED ), but is this the correct (or good) usage? Any comments would be helpful.

Cheers

Jellybean

int OnCalculate( const int rates_total,
                 const int prev_calculated,
                 const datetime& time[],
                 const double& open[],
                 const double& high[],
                 const double& low[],
                 const double& close[],
                 const long& tick_volume[],
                 const long& volume[],
                 const int& spread[] )
{
   int i;
   long Count;
   double PDayHigh, PDayLow;
   double Range;

   ArraySetAsSeries( time, true );
   ArraySetAsSeries( high, true );
   ArraySetAsSeries( low, true );
   ArraySetAsSeries( close, true );

   // Return if the data is not completely loaded *** is this the correct usage for SERIES_SYNCHRONIZED? ***
   if( !SeriesInfoInteger( NULL, 0, SERIES_SYNCRONIZED ) )     // if data is not synchronised
   {
      Print( __FILE__, __FUNCTION__ , "- Waiting for data synchronisation" );
      return( 0 );
   }

   i = rates_total - prev_calculated;
   if( i > rates_total - 2 )
      i = rates_total - 2;

   while( i >= 0 )
   {
      ...
      ...
      ...
      i--;
   } // while( i >= 0 )

   // return value of prev_calculated for next call
   return( rates_total );
}

[Tony]

Any ideas?

The help says what it is, but says nothing about what conditions exist for true or false. Does sychronised really mean that the data is all loaded without gaps?

ENUM_SERIES_INFO_INTEGER

Identifier	Description	Type
SERIES_BARS_COUNT	Bars count for the symbol-period for the current moment	long
SERIES_FIRSTDATE	The very first date for the symbol-period for the current moment	datetime
SERIES_SERVER_FIRSTDATE	The very first date in the history of the symbol on the server regardless of the timeframe	datetime
SERIES_TERMINAL_FIRSTDATE	The very first date in the history of the symbol in the client terminal, regardless of the timeframe	datetime
SERIES_SYNCRONIZED	Symbol/period data synchronization flag for the current moment	bool

Jellybean

[Slava]

Please read https://www.mql5.com/en/docs/series/timeseries_access

[Tony]

stringo:

Please read https://www.mql5.com/en/docs/series/timeseries_access

Thank you Stringo

All is clear now.

Jellybean