Initially i thought we may have a potential peak in Jan of this year for this stock , thus i was going on the basis of a potential peak for the SPX. However seeing as the SPX has continued to push higher, its inevitable that BRK was going to follow higher. As you can see essentially BRK is the SPX (or vice vera).
However having followed the SPX higher for the last few months i though it would be a good time to review BRK and see if it offers a clue to the direction of the SPX. I can make the case (well for the bullish case anyhow) that its close to ending wave  and a potential decline for wave  is close by. If the SPX pulls back in wave  we should see BRK pull back in sync,I estimate around 110 can be seen, there are enough gyrations to warrant caution now for the bulls.
Both the SPX and BRK have met a 1.618 fibbo extenion which is a common area for a 3rd wave