First hack at Charting analyzing Indicators: SPY Short

Showing volume decreasing over time and ceiling of 280. Showing resistance bottom at 276 consistently. Once it breaks through there, next expected resistance is 269. After that, resistance at the 200 Moving Average followed by the .5 Fib Retracement. Still looks like a potential upside from big picture but will continue to squeeze into a Bear flag. Once it breaks the 276 Level, I would expect a big drop.

I am new to this and working through the charts and indicators. Appreciate any feedback.
SPY