You need a program that can handle the tick bars better. I use tick
charts all the time and don't really need more then a few months but
it is easy to load say AAPL on a 1 tick basis which immediately pops
up over a million bars before it starts downloading more data. The
limit I run into is Windows only works one process up to something
over 1 gig before windows blows up. Now I don't use 1 tick charts but
it looked like a good way to see if there was some limit. Clearly
not, but I did get a memory warning as I had several charts open in
that process already when it got up to about 1.1 million bars.
Jimmy