⇆⇄

#exchange arrows #swap arrows #switch arrows #trade arrows #arrows overlapping #back and forth arrows #alternate direction arrows

⇆/⇄

#retweet symbol #cycle arrows #exchange arrows #share icon #repost symbol #unicode arrows #two arrows

⭕️⇌

#reversible reaction #chemical balance #two ways #exchange arrows #bidirectional harpoons #dynamic equilibrium #back and forth circle

⇆<small>(U+21C6)</small>

#arrow flipped #opposite arrows symbol #reverse arrows unicode #exchange arrows #left right arrows