| fkey_at | string | Future asset type |
| fkey_ts | string | Future ticker source |
| fkey_tk | string | Future ticker |
| fkey_dt | date | Futures expiration date |
| timestamp | timestamp | Timestamp of last update to record - UTC |
| prtNumber | bigint | Unique print set identifier, will increment but not guaranteed to be sequential |
| ticker_at | string | Underlying asset type |
| ticker_ts | string | Underlying ticker source |
| ticker_tk | string | Underlying ticker |
| tradingSession | string | Trading session ('None','RegularMkt','PreMkt','PostMkt','PostMktETF','NextDay') |
| tradingDate | date | Trading date |
| prtExch | string | Exchange where trade/print took place |
| prtSize | int | Number of contracts in the trade |
| prtPrice | double | Print price |
| prtType | int | Print type code |
| prtOrders | int | Number of participating orders |
| prtClusterNum | int | Incremental print cluster counter |
| prtClusterSize | int | Cumulative size of prints in this sequence |
| prtVolume | int | Total volume as of the print time |
| prtSide | string | SR-inferred print side ('None','Mid','Bid','Ask') |
| prtTimestamp | bigint | Exchange high precision timestamp in Unix epoch (if available) |
| netTimestamp | bigint | SR Gateway timestamp in Unix epoch |
| bidPrice | double | NBBO bid at print time |
| askPrice | double | NBBO ask at print time |
| bidSize | int | NBBO cumulative bid size at print time |
| askSize | int | NBBO cumulative ask size at print time |
| bidPrice2 | double | Second level NBBO bid price |
| askPrice2 | double | Second level NBBO ask price |
| bidSize2 | int | Cumulative size on the second level bid price |
| askSize2 | int | Cumulative size on the second level ask price |
| prtProbability | float | SR probability that buying prtSize shares @ prtPrice will have positive pnl 1 minute after time of print |
| bidPriceM1 | double | NBBO bid 1 minute after print time |
| askPriceM1 | double | NBBO ask 1 minute after print time |
| prtPriceM1 | double | Price 1 minute after print time |
| pnlM1 | float | Delta neutral pnl 1 minute after print time |
| pnlM1Err | string | Internal use |
| bidPriceM10 | double | NBBO bid 10 minutes after print time |
| askPriceM10 | double | NBBO ask 10 minutes after print time |
| prtPriceM10 | double | Price 10 minutes after print time |
| pnlM10 | float | Delta neutral pnl 10 minutes after print time |
| pnlM10Err | string | Internal use |