Or 22 might be an overestimation. But on Saturday, there is that chance to fine tune your position. But if you were holding long and looking for an increase of 7.4 by Sunday, and it goes up 5 on Saturday, well you get the same increase, just in pieces.
On the other hand if you are long and the movie bombs, well you get a faster chance to cut your losses. Once again, the ones paying attention "win" and the others lose. If you were short you will still get your total for the adjust, only in pieces, and it will show up faster
In both scenarios, if you think that there is no profit to holding on, you also have the advantage of bailing out and reinvesting elsewhere. In the scenarion of MOVIE above, if it gets to the EDP before the Saturday halt, and you see the trend, you CAN sell/cover.
Since HSX/Cantor-Fitzgerald are using the prediction data sold to the Movie industry, I wonder at what point they stop sending the data. Will the new Saturday data be the final answer as a prediction? If they have it worked out with the industry, then this will be for their benefit and we cannot complain.
As to the advantage held by people in the exhibitor industry, perhaps one should read the boards on Friday and Saturday. The insiders are sharing with us already. We have sufficient "deep throats" to not worry. The trends are posted. One onely has to read.