Several things are pointing to a reversal if we hit the $6900 level:
Two powerful fib levels converge at an almost identical price; A .618 retracement of the last major high on 9/4, and a 1.618 extension from the last minor high on 9/14 come within a few dollars of each other, right in the $6910-$6925 area.
My favorite oscillator, the stoch RSI, is entering the overbought range and I will be looking for a crossover in the coming days.
Keep in mind, other oscillators are more ambiguous at present.
It is also worth noting that there is a modestly visible high volume node in the $6900-$7000 area on the volume profile. This may also create some resistance, although only if the present rally turns out to be very weak.
Looking at volume, we had a modest but noticeable spike to get us from $6400 to $6700. This indicates some strength to me, but if the price does continue to climb without continuing strong volume I will be looking for a short entry.
My plan is to watch the volume closely if the price continues it's climb to $6900 and consider a short entry if significant resistance is met.
This is not the strongest feeling I've ever had about a reversal, but these several areas of confluence do point to an area of resistance, if not a proper reversal.
If a reversal takes place, I will probably be looking for a target in the $6100 range since this seems to be a major support level recently. A major breakdown below $6000 is of course a possibility.