An active penny stock is one that moves up, down or sideways on a daily basis with decent volume. Its tough to tell you exactly how much volume because at 2 dollar penny stock will often trade with less volume than a .0001 penny stock. Obviously with the .0001 stock you can buy a lot more shares with the same amount of money than you can with a 2.00 stock. The amount of volume should be enough to get you in the stock without the price jumping away from you and when you sell you don’t want the bid to drop on you due to the amount of shares you are selling. Read more on Active Penny Stocks