A great feature of MetaTrader 4 (MT4) is the ability to use script commands to draw vertical lines on a currency chart. In trading, a vertical line at a certain price can help indicate potential areas of support and resistance. Traders can use the line to set a stop loss order or to lock in profits when trading a security. This allow traders to easily determine their risk and rewards within the trade. Furthermore, the script commands will also allow traders to draw multiple vertical lines on their charts, thereby providing a clear picture of potential areas of entry and exit. With this feature, MT4 makes drawing vertical lines a versatile and useful feature for Forex traders.