Across all accounts, $SOL has a long/short ratio of 3.64: 78.5% long and 21.5% short.
There are more accounts going long. This compares the number of accounts—long accounts versus short accounts.
What matters more to me is which way it's moving; a single number doesn't tell you much.
In any case, don't get carried away.

Just my personal opinion, not investment advice.