Finally, keep in mind that if trading on margin—which means you're borrowing your investment funds from a brokerage firm (and bear in mind that margin requirements for day trading are high)—you're far more vulnerable to sharp price movements. Margin helps to amplify the trading results not just of profits, but of losses as well if a trade goes against you. Therefore, using stop losses is crucial when day trading on margin.
The tick volume is measured by how much the price is has ticked “up” or “down” in that particular candle bar. So the more people are getting in at the time, the longer the volume line will become. This is because there will be more movement in price action with all of those entry orders flying in. So it makes sense that the volume indicator is, first of all, very accurate, and second has no real lag to it. It is currently showing you what the price action is doing the number of “ticks” on that candle bar. This results in the bar looking like this:
You're probably looking for deals and low prices, but stay away from penny stocks. These stocks are often illiquid, and chances of hitting a jackpot are often bleak. Many stocks trading under $5 a share become de-listed from major stock exchanges and are only tradable over-the-counter (OTC). Unless you see a real opportunity and have done your research, stay clear of these.