diff --git a/files/routes/static.py b/files/routes/static.py
index 882d9757e..70bd9df06 100644
--- a/files/routes/static.py
+++ b/files/routes/static.py
@@ -74,14 +74,14 @@ def participation_stats(v):
 @app.get("/chart")
 @auth_required
 def chart(v):
-	file = cached_chart()
+	try: days = int(request.values.get('days', 0))
+	except: days = 0
+	file = cached_chart(days)
 	return send_file(file)
 
 
-#@cache.memoize(timeout=86400)
-def cached_chart():
-	days = int(request.values.get("days", 30))
-
+@cache.memoize(timeout=86400)
+def cached_chart(days):
 	now = time.gmtime()
 	midnight_this_morning = time.struct_time((now.tm_year,
 											  now.tm_mon,
@@ -95,7 +95,12 @@ def cached_chart():
 											 )
 	today_cutoff = calendar.timegm(midnight_this_morning)
 
-	day = 3600 * 200
+	if not days:
+		firstsignup = g.db.query(User.created_utc).filter(User.created_utc != 0).order_by(User.created_utc).first()[0] - 86400
+		nowstamp = int(time.time())
+		days = int((nowstamp - firstsignup) / 86400)
+
+	day = 3600 * days
 
 	day_cutoffs = [today_cutoff - day * i for i in range(30)]
 	day_cutoffs.insert(0, calendar.timegm(now))