ListMarketBook question

[OliasOfSunhillow]

According to the documentation listMarketBook should return the availableToBack, availableToLay lists as well as the tradedVolume. It appears to return the tradedVolume but not the first two, they return as empty lists via ['ex']['availableToBack'].
Anyone else come across this problem and found a solution

[OliasOfSunhillow]

Just solved my own question. Forgot the EX_BEST_OFFERS param...DOH!