Eth trading activity is highest at 3 to 4pm (London time)

Top 5 hours with >2x average volume
(UTC London)
1. 1500–1600
2. 1400–1500
2. 1600–1700 tie for second
4. 1900–2000
5. 1700–1800

Converting to (UTC -5 New York)
1. 1000–1100
2. 0900–1000
2. 1100–1200
4. 1400–1500
5. 1200–1300

Converting to (UTC +8 Shanghai)
1. 2300–0000
2. 2200–2300
2. 0000–0100
4. 0300–0400
5. 0100–0200

data: ethbtc trading volume every 30 minutes on poloniex
interpretation: on day 35 of 2016 (4 Feb), the volume from 10 to 10.30am UTC is more than 4 times the average volume for the day

data: ethbtc price high minus price low (price change) for every 30 minutes on poloniex
interpretation: on day 18 of 2016 (18 Jan), the price change from 4 to 4.30pm UTC is more than 4 times the average price change for the day

data: ethbtc trading volume daily on poloniex
interpretation: on the saturday of week 10 of 2016 (5 Mar), the volume is more than 2 times the average volume for the week

data: ethbtc price high minus price low (price change) daily on poloniex
interpretation: on the thursday of week 9 of 2016 (25 Feb), the price change is more than 2 times the average price change for the week

More information:
1. Interactive charts and raw data
https://slacknation.github.io/medium/004/