The trend graph shows usage values normalized to a certain time period (hour/day/week/month or year).
If your meter records a usage of 10kWh within one hour (10kW power), the trend will show a usage rate of 240kWh per day for that measurement point (10kWh/h = 10kW power rating, normalized to one day -> 10kW * 24h = 240kWh)
Machine Learning
Prydence uses machine learning to look at all the power in your home and pick apart the individual devices that are utilised.