Help with ranking

I have gone blank!  Please can anyone help me with the conditions for a trigger to do the following:

I am importing as list of selections with a ranking order against them, say 1 - 6 in a 6 horse race.  I want to pick those ranked 1st or 2nd.  That's easy:

selections imported_1   <=     2

BUT, a selection may get withdrawn from the race (say the one ranked number 2) so now I want to pick the remaining top two (ie those ranked 1 and 3 when I  imported the selections).

Any help appreciated.

Anyone?

Hi
Please try these as the last two conditions after your own conditions:

and selections sorting order is defined by imported_1
and selections trigger expression match_index is between 1 and 2

edit: and dispense with: selections imported_1   <=     2

Thanks Mark - will try

Hi, just to check please if the conditions worked with the ranking?