Hello everyone, rookie developer here After been using sites like GW2BLTC and GW2TP for almost a year, I happened to notice that I don't see stock market like visualizations on those tools. So I went around and started to explore the API myself to see if that was possible. That said, I was happy to see that most of the data I would need comes from the /commerce/ endpoint, and this kind of visualization can be done in a multitude of libraries. So here come the challenge: as far as I am aware, I would need to keep track of daily prices of items (buy and sell), with a relative small interval between collection, for each of the desired items, which would be expensive in requests (possible banning my ip address due to DoS suspicion), and in data storage (not all items change price in minutes notice). If possible, I would look for advice in how to deal with these two topics(like a good ratio to make those requests or a good way to store it). I intended to use python as backend for data collection and preprocessing, and javascript for visualization, so if there's some smart way to deal with the requests problem easily please let me know. Also, this may be a stupid idea, so I am open to critique. I was thinking of using firebase as my data storage, but I think I would explode the free quota really soon. My goals with this are #1 Be able to provide the community with some other tool to help with TP investments, and #2 be able to collect some good amount of GW2 economy data for future analysis. Thanks in advance with any help or advice, and best regards.