diff --git a/dashboard.py b/dashboard.py
index 37fd9bb..816e375 100644
--- a/dashboard.py
+++ b/dashboard.py
@@ -171,7 +171,7 @@ class TimeSeries(Widget):
         tickmarks.append({"t": t, "t_h": d.strftime("%Y-%m-%d %H:%M:%S"), "x": x})
 
         min_step = 25
-        steps = ("s", "m", "h", "D", "M", "Y")
+        steps = ("s", "m", "h", "D", "10D", "M", "Y")
         step_i = 0
         while True:
             t0 = tickmarks[-1]["t"]
@@ -226,6 +226,45 @@ class TimeSeries(Widget):
                         step_i += 1
                         continue
 
+            if steps[step_i] == "10D":
+                year = d0.year
+                month = d0.month
+                day = d0.day
+                if day > 21:
+                    day = 21
+                elif day > 11:
+                    day = 11
+                elif day > 1:
+                    day = 1
+                else:
+                    day = 21
+                    month -= 1
+                    if month < 1:
+                        month += 12
+                        year -= 1
+                d1 = datetime.datetime(year, month, day)
+                t1 = d1.timestamp()
+                x1 = t2x(t1)
+                if x0 - x1 < min_step:
+                    if day > 21:
+                        day = 21
+                    elif day > 11:
+                        day = 11
+                    elif day > 1:
+                        day = 1
+                    else:
+                        day = 21
+                        month -= 1
+                        if month < 1:
+                            month += 12
+                            year -= 1
+                    d1 = datetime.datetime(year, month, day)
+                    t1 = d1.timestamp()
+                    x1 = t2x(t1)
+                    if x0 - x1 < min_step:
+                        step_i += 1
+                        continue
+
             if steps[step_i] == "M":
                 d1 = datetime.datetime(d0.year, d0.month, 1)
                 t1 = d1.timestamp()