If you're seeing a line chart instead of a candlestick chart in MT5, it likely means the chart type is still set to 'Line'. You can switch it back to candlesticks manually. To view a candlestick chart, make sure to select the correct chart type in MT5.
When comparing a candlestick vs. line chart, candlesticks provide a more detailed price data. If the candlestick chart still isn’t clear enough to view all the details, try using the 'Zoom In' tool to make it more visible.
For better visualization, please refer to the following GIF: