API Documentation

Category Description

Only sent if exchange open/high/low/last is significantly different than trading record summary.

Category Identification

pNxCoreMessage->coreData.Category.pnxStringCategory->Atom 17
pNxCoreMessage->coreData.Category.pnxStringCategory->String NxRefreshOverride

Update Time and Frequency

Approximate Time Info
Constant Updates Constant updates throughout the day

Category Fields | 5

Index FieldName FieldType C Code Info
0 First NxCFT_PRICE pnxFields[0].data.nxPrice Override the open trade
1 High NxCFT_PRICE pnxFields[1].data.nxPrice Override the high trade
2 Low NxCFT_PRICE pnxFields[2].data.nxPrice Override the low trade
3 Last NxCFT_PRICE pnxFields[3].data.nxPrice Override the last trade
4 VolDiff NxCFT_32BIT pnxFields[4].data.i32Bit Difference in volume after the override

Code Sample from CategoryDumper project:

void onNxCoreCategory_17(const NxCoreMessage *pNxCoreMsg)
{
     NxCategoryField *pField;
			 
     // Print the category num and the Symbol
     PrintSymbol(pNxCoreMsg); 			 
 			 
     pField=&pNxCoreMsg->coreData.Category.pnxFields[0];
     if (pField->Set)
         printf("First: %0.4f \n",
                pfNxCorePriceToDouble(pField->data.nxPrice.Price,
                                      pField->data.nxPrice.PriceType)); 			 
 			 
     pField=&pNxCoreMsg->coreData.Category.pnxFields[1];
     if (pField->Set)
         printf("High: %0.4f \n",
                pfNxCorePriceToDouble(pField->data.nxPrice.Price,
                                      pField->data.nxPrice.PriceType)); 			 
 			 
     pField=&pNxCoreMsg->coreData.Category.pnxFields[2];
     if (pField->Set)
         printf("Low: %0.4f \n",
                pfNxCorePriceToDouble(pField->data.nxPrice.Price,
                                      pField->data.nxPrice.PriceType)); 			 
 			 
     pField=&pNxCoreMsg->coreData.Category.pnxFields[3];
     if (pField->Set)
         printf("Last: %0.4f \n",
                pfNxCorePriceToDouble(pField->data.nxPrice.Price,
                                      pField->data.nxPrice.PriceType)); 			 
 			 
     pField=&pNxCoreMsg->coreData.Category.pnxFields[4];
     if (pField->Set)			 
         printf("Vol Diff: %d \n",pField->data.i32Bit);     
}