https://www.tensorcharts.com/here on this site you can watch walls by altcoins and bitcoin, but it is most effective to look only by bitcoin, there you can see support with resistance and a hole where there are no orders, and based on this, certain conclusions can be drawn. I recommend using in conjunction with anything else, I use levels on the chart.
There are many other sites with similar informations, what we need to do is to make conclusions by ourselves, in the end it's always like that with any source of informations. Telegram and Twitter are good sources, cause some people have good analysis of the informations we all have, it's easy way to get to some good info only if you follow the right people, and you checked their informations more then once.