But is that free? Like there is no limitation using it?
I think that is not free service because upon trying to visit the site, it says I need to subscribe to the premium to use the filter. So, it's totally paid service. Hopefully, there is a free trial even just an hour of reading the price chart and probably OP gives an update about this. I like it too because this indicator is easy to understand no more lines interrupt upon reading the indicator.
Technical analysis(TA) is very important in trading but other's problems are dont know how to use indicators. Because it is very hard to understand for them reading a chart. I think this one will be the answer, it's very simple and clean to read.
So the site sells news apis which has a premium version. however the trading dots atm aren't charged. a free version is there with limit and delayed data so you can have a look at how things work. and a price point will be there in the future, but it'll be super reasonable.
currently this is just an idea and it has greatly improved my trading performance as i can get a lot of valuable insights from it. hoping for people (even beginners) to see the same. I've written a blog post to help people understand how to use it; do try it out and let me know?
https://medium.com/cryptocontrol/understanding-the-volume-dots-a-new-to-way-to-visualise-volume-593035f276f1