Yes, I'm definitely still happy with it. Ive been using the DAS software from Realfasttrader.com for years now. I wouldn't use anything else, especially when trading penny stocks.
I dont think it shows you the % you are up or down, but it tells you the $ value you are up or down at all times.
You should try their free simulator to test it out.
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I am holding the stocks I discuss on this board, unless stated otherwise. I am not giving any investment advice. Penny stocks are risky investments. Do your own research before buying any stock.