Don't place an order in the first minute after news breaks; wait for the candle to close before making a judgment.
Take this one as an example: F2Pool co-founder Wang Chun sold 7,740 ETH during the rebound, receiving 18.5 million USDC.
Next, keep an eye out for more official details.
$ETH is currently at 2429.19 (24h +7.14%).