One way to source for ideas to research is to look for promoters increasing stake in their companies.
Insider Trading Disclosures - You can download the historical disclosures from the following link. ( Select the dates and click on the download button in the corner )
We have just highlighted the interesting insider trades in the last 1 year. ( have only focused on entries where promoters have done a direct market purchase.)
Interesting Insider Trades 2018