When my Octopus Agile electricity price is below x pence per kWh then turn on my Wemo SmartPlug to take advantage of low prices. Set your own price threshold and Wemo Smartplug settings. You can also use this Applet to set the WeMo to 'off' when the price rises past a threshold instead.
Explore more great ways to automate WeMo Smart Plug and Agile Octopus