You can chart the percentage of shares a company has shorted to help monitor the level of short-interest in the business and whether that is contributing to current price sentiment.
When there is a spike in the amount of short interest and/or there is a consistent high level of short interest, it can mean negative sentiment exists and that the stock may be in for a period of extreme volatility.
Please note: The data for percentage shorted is 4 days behind as it's sourced from ASIC which releases this information with a delay of four trading days to allow for the accumulation of data and checks to be made.