I'll have a read thru the syntax list, any chance of making the log highlight invalid search params? not a big deal I guess but for trial by error attempts, can easily see where I went wrong, again im not sure how hard things like this are to implement, dont want you doing more work for little benefit!
https://www.reddit.com/r/pathofexile/comments/3wmyp6/release_durian_v03_automated_trade_search/cxxj7te