Not necessary. Below is the Stock price movement of the last two earning report
1) On June6th report, Stock price went from $1.70 to $2.01 on June 6th, and top at $2.94 on July 6th in that up movement right after earning
2) On Sep 6th report, Stock price went from $3.21 to $3.08 on Sep6th, and top at $3.89 on sep 14th in the upward movement right after earning
So, on June 6th report, Stock price went up from 1.7 to 2.92 on July 6th , or 72% in one month
On Sep 6th report, stock went from $3.21 on Sep 6th to $3.89 on Sep 14th, or 21% in one week
So, tomorrow, the stok price may follow the pattern of June 6th or Sep 6th, but it will go up after earning. Just look at all the housing stocks, it look like a new upward trend just started.