Tip: Always set your Stop Loss when you open a trade, even where it isn't mandatory on your plan - it's the simplest way to stay within your risk limits.
There are a few ways to open a trade in MT5 - use whichever feels most natural.
Using the order window (recommended)
Press F9, or right-click a symbol in Market Watch and choose New Order.
Set your volume (in lots), and optionally your Stop Loss and Take Profit.
Choose Market Execution for an instant fill at the current price, or set up a pending order at a specific price.
Click Buy or Sell to place the trade.
One-click trading
Press Alt+T on a chart to enable the one-click trading bar, and accept the disclaimer if prompted.
Click directly on the Buy or Sell price shown on the chart to place a market order instantly.
Always set your Stop Loss when you open a trade, even where it isn't mandatory on your plan - it's the simplest way to keep a single position within your risk limits.