Is it possible to conduct range orders as defined below? I see a few different Buy methods, but I'm not seeing exactly how I can do this.

Market Range Orders

This order type allows you to set an acceptable price range (in pips) to execute market orders. If your order cannot be filled within the range selected, the order will be canceled and no trade will be opened. So this limits the amount of slippage your order could face. The wider you set the range, the more likely the order will be filled. To learn more about market and market range orders, click here.