strange narrow range of BTC price

I've been watching the BTC price since 2011, and I have never seen BTC in such a narrow range for such a long time. For close to 1 month now, it has been in the exact range of [$29,000, $31,000]. Which is almost exactly half the all-time high.

Has it ever traded in such a narrow range for so long since 2011? This behavior seems algorithmic. Right at $30k. Not too far below, not too far above.