Your InvestEngine account shows charts for each ETF you have added to your portfolio, as well as a chart for your overall portfolio performance.
The ETF chart will show the previous days closing price for that specific ETF; this pricing data is updated at 6am every morning. This is not the live intraday prices.
You can also view historical performance for both that individual ETF and your portfolio as a whole, by selecting the different time periods at the bottom of the chart, which range from 1 week to MAX (the maximum amount of data available for that ETF or your portfolio).
You can toggle on 'Contributions' option on your charts, to display when in time you have made contributions to that ETF.