Also, a lot of the mechanics of a stop order are missing in your example. Here is IB's stop order definition. From that definition,
A Sell Stop order is always placed below the current market price and is typically used to limit a loss or protect a profit on a long stock position. A Buy Stop order is always placed above the current market price. It is typically used to limit a loss or help protect a profit on a short sale.
What this means is that you typically only use stop orders to close positions. You still need to place a limit/market order to open the position. Placing a buy stop with a price below the market price should just cause it to be converted to a market order and executed right away. You will need to make sure you are using the order types correctly before you'll be able to to tell if the stops help.