diff --git a/rustybot/src/models.rs b/rustybot/src/models.rs
index 9c12914..a5fb122 100644
--- a/rustybot/src/models.rs
+++ b/rustybot/src/models.rs
@@ -384,16 +384,21 @@ impl Position {
     }
 
     pub fn update_profit_loss(&mut self, best_offer: f64, fee_perc: f64) {
-        let best_offer = best_offer.abs();
-        let base_price = self.base_price * (1.0 + fee_perc / 100.0);
+        let (base_price, delta) = {
+            if self.is_short() {
+                let base_price = self.base_price * (1.0 - fee_perc / 100.0);
+                let delta = base_price - best_offer;
 
-        let delta = if self.is_short() {
-            base_price - best_offer
-        } else {
-            best_offer - base_price
+                (base_price, delta)
+            } else {
+                let base_price = self.base_price * (1.0 - fee_perc / 100.0);
+                let delta = best_offer - base_price;
+
+                (base_price, delta)
+            }
         };
 
-        let profit_loss = delta * self.amount;
+        let profit_loss = delta * self.amount.abs();
         let profit_loss_percentage =
             ((1.0 - (base_price + delta) / base_price) * 100.0).abs() * profit_loss.signum();