观察，再观察。

strategy/src/predictor.rs

@@ -396,9 +396,9 @@ impl Predictor {
         let last_price = Self::DONT_VIEW;
         let fair_price = Self::DONT_VIEW;
 
-        let spread = self.fair_price;
-        let spread_min = self.mid_price;
-        let spread_max = Self::DONT_VIEW;
+        let spread = self.mid_price;
+        let spread_min = self.fair_price_std_vec[0];
+        let spread_max = self.fair_price_vec[0];
         // let spread = self.price_times_avg;
         // let spread_max = self.fair_price_vec[1] / self.fair_price_vec[0];
         // let spread_min = self.fair_price / self.mid_price;