Shanthi,
I know that Handicapping/Betting is not going to be very high on your priority list for the rewrite but, when you do get around to it, I have a suggestion for two additional bet types (on top of Trish’s already suggested Superfecta):-
First of all, as Trish (North Oak) said, Quiniella should be renamed Exacta.
Quiniella:- First two picks must finish 1-2 in any order - $250.
Triple Forecast (can’t think of a better name):- Picks must finish 1-2-3 in any order - $500.
I love that idea I tend to be able to pick the top 3 but not Lways the right order,lol
Aw I feel loved that you mentioned my thoughts on the topic 
I think Shanthi said Superfecta could be a possibility in the rewrite. There was a thread on it in the betting forum
Oh and how about a ‘Pick 6’
I believe this is called a “trifecta box”.
Thank you. That definitely has a better ring than “Triple Forecast”. I figured that there had to be a name for that type of bet (shows how much I know about betting on horses in the US).