I think you need to develope a script which would split word.
Now, In case of 'onlinetradeing', You can follow the approach mentioned below
assume that you want to split the word in only 2 words then you need only 14 combinations for the said case. (i.e. Total Letters). Your script can create a list of these words and check every word against dictionary and pop-up valid suggestions. Your 'TO BE VALIDATED' list would be
a) onlinetradeing
b) o nlinetradeing
c) on linetradeing
d) onl inetradeing
.
.
.
n) onlinetradein g

I think splitting the words should be cakewalk through regex.