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Trading platform

Hi all new to all things trading so I apologise in advance.
I am looking for a trading platform for day trading stocks that enables me to filter price, volume and others things. The platform must have a demo account and for the main account not to be to expensive as I will only be dealing in small amounts.
Ideally I would like it to be user friendly as I have come across a couple that are just too advanced for the beginner.
Thanks in advance
Some of the comments on the platforms in the Trading and Investment Software section of the site might help.
I use Ninja Trader for trading the mini S&P futures contract. I love it. Easy to set up charts. Easy to place orders.
They offer free demos. Not sure how their platform works for stocks.