blowfish,
One step ahead of you, it infact does already record the bid ask changes, the following is what is recorded:
1. last tick as comes in through IB
2. bid
3. ask
4. bid size
5. ask size
6. last size
7. volume
All of these componets for every symbol you have it set to record for,as they come in from IB is stored, and when replayed all of these are then read back in, in the order in which they arived from real time, effectively simulating a 100% authentic replay of the day that happened.
One step ahead of you, it infact does already record the bid ask changes, the following is what is recorded:
1. last tick as comes in through IB
2. bid
3. ask
4. bid size
5. ask size
6. last size
7. volume
All of these componets for every symbol you have it set to record for,as they come in from IB is stored, and when replayed all of these are then read back in, in the order in which they arived from real time, effectively simulating a 100% authentic replay of the day that happened.