diff --git a/src/main/resources/templates/PageResource/historial.html b/src/main/resources/templates/PageResource/historial.html
index 17c5ae6..88a131a 100644
--- a/src/main/resources/templates/PageResource/historial.html
+++ b/src/main/resources/templates/PageResource/historial.html
@@ -546,10 +546,12 @@
           if (!data.length) return [];
           const max = Math.max(...data.map(d => d.profit));
           const min = Math.min(...data.map(d => d.profit));
-          const range = Math.abs(max - min) || 1;
+          const range = Math.abs(max - min);
+          const useAbsoluteScale = range === 0 || max === 0;
+          const ref = useAbsoluteScale ? Math.max(Math.abs(max), 1) : range;
           return data.map(d => ({
             ...d,
-            heightPct: d.profit === 0 ? 5 : Math.max(10, Math.abs(d.profit) / range * 90)
+            heightPct: d.profit === 0 ? 50 : Math.max(15, Math.min(90, Math.abs(d.profit) / ref * 90))
           }));
         },