Thats not how the product works, you would need to look at what...

Thats not how the product works, you would need to look at what the futures were predicting the day before and work the futures look the next morning.

There was a big swing on this product last week because after a few red days BBUS was +~3% at AU market close late last week, predicting another red day for S&P500, but on open the S&P500 went up, so the next morning the product dropped, despite the futures showing a slightly negative that day.