Alpari (US), LLC is dually registered with the CFTC as a FCM and RFED and is a member of the NFA. NFA Member ID: 0379678.
To view the "Order" window:

Order window (Instant Execution)
In MetaTrader 4 there are two ways of making deals: ‘Instant Execution’ and ‘Request Execution’.
Instant Execution means that you do not have to request quotes, as you see real-time dealable prices in the ‘Order’ window and in the ‘Market Watch’ window. Once you have decided to buy or sell at the current price press the "Buy" or "Sell" buttons to open a long or short position. For the instruments which are traded in the ‘Instant Execution’ mode all quotes which are in the "Market Watch" window are executable, not indicative.
For the instruments traded in the "Request Execution" mode all quotes in the ‘Market Watch’ window are indicative and the "Buy" and "Sell" buttons are inactive. In order to make a deal you should request the quote from Alpari (US) by pressing the "Request" button:

Order window (Request Execution)
Once you see the quote it remains dealable for several seconds:

The quote is valid for making a deal within several seconds
Once the "Buy" or "Sell" button is pressed and the deal is confirmed, your long or short position is open:

Deal execution confirmation
The position is now listed in the ‘Trade’ tab of the ‘Terminal’ window.
‘Instant Execution’ differs from ‘Request Execution' in that Instant Execution only takes a few seconds to deal compared to the ‘Request Execution’ which can take up to 30-40 seconds (on the Demo Accounts all operations are made within few seconds, as demo accounts are quoted automatically, whilst live accounts are quoted manually). In the case of ‘Request Execution’, all quotes in the ‘Market Watch’ window are indicative, so they may differ from those offered by the company for making a deal.
Before you make a deal you can change its details in the ‘Order’ window:
In order to close a position, select the trade within the ‘Trade’ tab of the ‘Terminal’ window, right-click to view the context menu and select "Close order."

The context menu of the Trade tab of the Terminal window
You can also double-clicking (Left) on the position and close the position by choosing to do so in the "Order#__" window.

Close the position (Instant Execution)
For instruments which are traded in the ‘Request Execution’ mode, you have to request a quote before closing a position:

Close the position (Request Execution)
Once you press the Request button Alpari (US) gives you the quote and the "Close position number" button becomes available:

Close the position (Request Execution) - step 2
If a currency pair is traded in the "Instant Execution" mode there is no need to request a quote. This is why once the ‘Order #__ ...’ window appears the "Close #position number…" button becomes active.
If the market is stable then execution is usually made at the quote shown by Alpari (US). The market can be very volatile and the quote offered several seconds ago may become invalid (even before those several seconds, which are given to you for the decision-making process, run out). In this case the quote is revoked and the "Requote" window with a new quote appears.