Hello, 

I am backtesting a strategy where there is stop loss orders. I am backtesting the future contract “/ZN” and always using the contract that is about to expire. 

After Logging prices, I found that 1 second difference can move the bid/ask price significantly. As in attached screen shot which is the main reason for this slippage. Notice Bid changes in 1 second from 10.53 to 108.48

Does this mean that there is an issue with the data quality as this pricing doesn't seem realistic? 

 

225346_1680214540.jpg225346_1680214532.jpg



Thanks, 
Ahmed.