Does TT have tick charts?

Yes. TT supports tick charts.

Is TT developing customized tick charts like e.g. a 89 tick chart?

You're talking about Renko bars, right? I think this post calls them "Range Bars".

https://community.tradingtechnologies.com/questions/5164/view.html

No. I am talking about Tick charts like the headline of this post.

what is "a 89 tick chart" ?

Just let's talk about a 60 tick chart to make it easier. It's the same like a 60 minutes chart just that one bar is constructed out of 60 ticks instead of 60 minutes.

1 tick = 1 trade...regardless of volume transacted.
Up until 2009 this was reported from the CME from the aggressor side of the trade.
Post 2009 the feed reported every small order from a 1 lot retail side.
In 2016 MDP 3.0 went back to aggressor side and the retail crowd went ape wanting every
1 lot showing because that size matters. ;)
So some feeds are aggressor side while others break it up.

It would be nice if TT could comment on the question about custom size tick charts...