Ethereum trading method from a big player on GDAX

This relatively big player has on GDAX a couple of orders on the sell side and the buy side.

He* has 149.274 ethereum on the sell AND the exact same amount on the buy side.
*( I don't know for sure, but I assume he is one and the same person.)

At first I thought this was strange but when I looked on the chart of ETHEUR it made sense. buying low, selling high.

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Disclaimer: This is not financial advise.

I just want to give my humble opinion on some products by doing technical analysis. There may be some minor and/or major flaws. Nobody is perfect and I'm willing to learn from my mistakes through your opinions. Thank you.

Money making posts:
https://steemit.com/money/@bo3ia/how-to-make-money-in-stocks-and-cryptocurrencies
https://steemit.com/money/@bo3ia/make-money-with-the-s-and-p500-index
https://steemit.com/cryptocurrency/@bo3ia/risk-management-in-cryptocurrency-and-stocks

Image source: https://www.tradingview.com/