I work for a quantitative stock trading firm, and if this data is an effective predictor of stock returns you are underpricing it by a factor of about 4x to 25x. Most data providers charge at least $10,000/year, with the more effective ones charging in the six figures.<p>The primary thing a quantitative trader would want to see is a rigorous track record. Ideally this would be a "point in time" record where you record the information that would have been available as of a certain time in the past. If you don't have the data recorded for that, or it's for too short a time period, the next best thing would be to rerun your metric on all the historical tweets you can get your hands on.<p>Showing potential customers a mostly complete historical dataset of what you would have told them is a fairly common way of selling this sort of data. Don't show them anything too recent so that they need to buy the data from you. Firms have different investing processes, and so they often need to see a larger sample of data in order to know whether it fits well with how they invest.<p>Please feel free to contact me if you'd like to talk more about this -- my email is my handle at Google's mail service.