Startup Idea: Stock Market Predictive Analysis from Social Media

Startup idea to develop a software that can analyze and compile sentiments from social media posts, particularly tweets, and predict how specific stocks will perform based on identified keyword trends.

I am a stock market day trader. I need something that can analyze and compile a list of tweets and determine if certain words can predict if a stock will go down or up in the near term.

Words like POS are common on stocks that are going down, but is that a sign that it will go back up? There are oversold conditions, etc. There are websites like stocktwits.com that need some data analysis. I tried but didn't find anything.