diff --git a/dashboard.py b/dashboard.py
index a90179b..b650c7e 100644
--- a/dashboard.py
+++ b/dashboard.py
@@ -171,7 +171,7 @@ class TimeSeries(Widget):
             min_step = 25
             steps = ("s", "m", "h", "D", "10D", "M", "Y")
             step_i = 0
-            while True:
+            while step_i < len(steps):
                 t0 = tickmarks[-1]["t"]
                 x0 = tickmarks[-1]["x"]
                 d0 = datetime.datetime.fromtimestamp(t0)