Nothing abnormal at all-
Just the market going into pre-closing before 4pm........where trading pauses and any bid or offer can be made at any price - often causing a pricing overlap. Then at 4.10pm the overlap trades at the market determined overlapping midpoint price trades. The last gasp of the day to certainly buy or sell.....
OEX Price at posting:
17.5¢ Sentiment: Buy Disclosure: Held