From my reading it seems that day trading involves moving in and out of trades quickly - how much would you need to be investing to make this worthwhile? Over the last couple of months, things seem to be moving rather slowly?
I would say a minimum of $1000 will be a good start.
That beiing said, with that amount you can diversity and have a very well distributed porfolio.
Some points I note that trading is risk and it is not everybody cup of tea . Be ready to take losses as well and hold for some months if required . You need to have Patience and not all trades will give you profits . You may have to book losses as well .