To bring up the "New Order" window you can: Press F9 on your keyboard;
Right-click a symbol in the Market Watch window and select 'New Order' from the pop-up menu;
Right-click on the open chart and select "New order";
Click on the "New Order" button in the toolbar.
In the pop-up window please select the symbol from the drop-down list, set the volume of the order in lots, set Stop Loss or Take Profit level and select the type of your order.
If you choose "Market execution", simply click "Buy" or "Sell" below to open the position at the current market rate.
If you'd like to open a pending order, select it as the order type.
Next choose its type (i.e. Buy Limit, Sell Limit, Buy Stop or Sell Stop) and specify the price at which it will be triggered.
Click the 'Place' button to submit the order.
To specify Stop Loss or Take Profit level, click the up or down arrow to fill in the current price and adjust it to your Stop Loss or Take Profit price. As soon as the position has been opened, it will appear in the Trade tab.
MT5 also allows you to open and close positions with one click. To enable One-Click trading, select 'Options' from the 'Tools' menu. In the Options window, open the Trade tab, tick 'One-Click Trading' and click OK to apply the changes. With One-Click-Trading, you can perform trading operations on the chart.
To enable the One-Click Trading panel right click the chart and tick One-Click-Trading in the context menu. The panel can be used to place market orders with specified volumes. You can also place a pending order from the Trading submenu of the chart's context menu. Right-click on the necessary price level on the chart and select the type of pending order you would like to open. Available pending order types at this price level will be displayed in the menu.