listmarketbook resulting in limited results

[jabe]

Yes, availableToBack shows unmatched money (size) and odds (price) waiting for a back bet. availableToLay shows unmatched money and odds waiting for a lay bet.

If you try to place a back bet at higher odds than any of the available ones, your stake will appear in the availableToLay data, and vice-versa if you try a lay bet at lower odds.