discount broking

I gave a vague title because I really don't know whats this order or trading method is called. I know about limit, market, stop loss market and stop loss limit orders but I dont think this comes under any of those order type. Let say a stock's current price is Rs 100. I want to place a buy...

There are two types of brokers found in the market when it comes to trading. What are the differences between the two brokers?