Fettucine the significance of a high or low close often, if not always, depends on the volume and previous bar patterns.
e.g Is a close on the high professional buying or have they sold into strength ready to take it down?
A short up bar on high volume is often the latter, for instance (if it was real buying why is the bar short?), as is the traditional long up bar on very high (climactic) volume that shows transfer of stock from weak to strong hands as the weaks panic. All to be taken in context of previous bars (and, indeed often the next few bars to confirm a negate an earlier signal of strength or weakness).
The rejection bar at 15:50 (5 min) that almost closed the gap was a clear sign of background weakness especially as it followed a low volume short up bar that showed little demand (with hindsight. LOL) which is why I suspected a down move following gap fill.
Remember I'm still pretty d'uh about P&V so take the above with a cruet of Maldon. But I am beginning to believe the clues are always there if you look hard enough.