Where can I find real-time indicators of economic activity?
The projects developed by Alberto Cavallo and Roberto Rigobon could be a source of inspiation.

The Billion Prices Project is an academic initiative that uses prices collected from hundreds of online retailers around the world on a daily basis to conduct economic research. This page shows their most recent research leveraging high-frequency price data, as well as the US daily inflation index (updated monthly).

Here are the datasets on Online Micro Price Data, Global Retailers Data...