You are criticizing his post about ripple that shows minimum difference. However, Please follow link what Haejin has mentioned about the same ripple. Please do not compare apples with oranges.
A subtle error is acceptable; however a blunder like your friend did is unacceptable in market.

https://steemit.com/rippl/@haejin/ripple-to-wave-towards-usd15-44-or-higher