After the market closes and you are out of any important stuff, go into your operating system and clear all the cache files. Since I am not familiar with Mac, I have no way to direct you. There should be few places where they store the caches files, I guess. One under the username and one under the safari folder.
See what happens after clearing the cache files, before jumping into other things.
Tennis, I do NOT include the pre-market, and I saw that the the lower BB was breached today when we got close to 94 on the ONE hour chart. I don't think your settings were necessarily off. I could be wrong.
I used it to make a trade...and I do not like to trade around Eastern Standard Time lunch hour, but it worked.
Nova - Many thanks - that does make a big difference. It has an option "Last Day Only until market opens". I guess that uses the premarket data up until the market opens.
Mary - thanks for helping to find this - I was using the default setting I guess.
I have yahoo email, use a MacBook Pro and am a client of Schwab's. So my charts are running in the background all day, but if I go to my email then they disappear. I get a message that says something about Flashplayer and unexpected something and that it has quit . . and would I like it reported . .that is what the message box says and I click yes.