My general impression of the chart is that it moved up too fast in June/July and requires a multi-month consolidation period before it can have another major move up. There is a classic topping formation in the middle of July - blow off top followed by a failed rally. This is a short term formation, so it isn't necessarily an intermediate or long term top - but it could be.

I might be wrong, and it could indeed be a bull flag but it must break the short term downtrend line (likely) and then make a new high (iffy). It would be OK to buy a break of the short term downtrend, but you should place a stop just below the most recent low in case it's the start of an intermediate or long term downtrend. This would be a decent risk/reward setup.