Market depth analysis

Hey guys, I just came across the market depth window and I was pretty confused. Can anyone help me, I wanted to know how I can decide whether this stock would be a buy or sell. I've also heard people say that it can help plot S/R, how exactly do I this without a chart? I don't plan on trading without a chart, but I wanted to know. Let's just assume there are no charts. You only have the market depth. How do you trade off it?

PS: In moneycontrol, you can enter a stock and below the area in BSE where they have closing price and all that, you see market depth. Move your mouse near the 'i' and you'll see it. Just in case some of you wanted to help with a visual example. :)

Btw, I'm looking to scalp.