RE:Oil was $36.50 or so Friday closeUnlucky is correct about 1 thing - the 2:30 close was 35.92. This is really the only "close" that matters - it is the price that the next day (Monday) will reference. Unlucky also refers to the 4:00 close - there is no 4:00 o'clock close. That happens to be the price that oil was trading at when the markets close. Electronic trading closes Friday at 5:15. But what happens between 2:30 and 5:15 is almost always inconsequential - trading volumes are minimal. Similarly trading activity through the overnight are usually not meaningful. The exception would be if there was a major event happening (Asian markets crashing or some sort of geopolitical event).
What Unlucky will say is that by referencing the 2:30 close we are over-stating oil's rise since Friday - but not really because the movement after 2:30 had no volume and is therefore meaningless.
Sure green is always better than red, but nothing really counts until the morning.