Is it incorrect to say Daytrading instead of Day trading?

Or is it considered acceptable both ways?

 

To check whether a compound noun is two words, one word, or hyphenated, you may need to look it up in the dictionary. If you can't find the word in the dictionary, treat the noun as separate words.

 

A third possibility would be "day-trading".

 

I like Active Trader.

 

Now it's called High Frequency Trading, anything else between 9:30 am and 4:15pm is gambling