So, here is my suggestion :-

1: Guesses to be in steps of 25 OR

2: Guesses to be in steps of 10

PLUS

3: You get the 5+5 if you are within +/-25 and you get a bonus if you are within +/-10

PLUS you get 5 for getting the direction right- up , down or same, just as it is now.

Now we can have "joint first" etc.

Of course, this assumes you enter within the prescribed times set out already. Enter on Thursday, and you only get 1+1 and 1 for bonuses.

Comments and suggestions please.