diff --git a/src/components/d3/monitoring/D3MonitoringCharts.tsx b/src/components/d3/monitoring/D3MonitoringCharts.tsx
index 8215cce..3edb11e 100644
--- a/src/components/d3/monitoring/D3MonitoringCharts.tsx
+++ b/src/components/d3/monitoring/D3MonitoringCharts.tsx
@@ -35,13 +35,14 @@ const roundTo = (v: number, to: number = 50) => {
     return (v > 0 ? Math.ceil : Math.round)(v / to) * to
 }
 
+const getNear = (n: number) => {
+    let k = 0
+    for (let c = Math.abs(n); c >= 1; c /= 10) k++
+    return Math.pow(10, k) * Math.sign(n)
+}
+
 const calculateDomain = (mm: MinMax): Required<MinMax> => {
-    let round = Math.abs((mm.max ?? 0) - (mm.min ?? 0))
-    if (round < 10) round = 10
-    else if (round < 100) round = roundTo(round, 10)
-    else if (round < 1000) round = roundTo(round, 100)
-    else if (round < 10000) round = roundTo(round, 1000)
-    else round = 0
+    const round = getNear(Math.abs((mm.max ?? 0) - (mm.min ?? 0))) || 10
     let min = roundTo(mm.min ?? 0, round)
     let max = roundTo(mm.max ?? round, round)
     if (round && Math.abs(min - max) < round) {