Investments are a goal of many, and a goal here is to help you best reach those goals.
When should you buy, hold, or sell an investment?
This is one of the biggest questions. Part of the goal of 
First would like to ask what "investment(s)" you would like such data for?
This will more than likely be some crypto majors such as bitcoin (BTC), Ethereum (ETH), and HIVE being on the Hive blockchain. Data is readily available to be analyzed and offered for these and many others. Possibilities include stocks too.
Will provide some samples soon. This way to provide some sort of proof and test run type of thing.
With such data in NFTs maybe they could form of a market of the NFTs themselves and possibly being "bought" back at some value so part of the value could be recycled. This could be a way to add some gamification to the idea being presented. While also being something to practice trading. Many of these things are still in the idea stage. Other than the base data itself. Have a foundation and wondering how to grow with it to help others grow.
Leave a comment of what "investment" you may be interested in such information with, and shall see what may be delivered to fulfill such requests.