diff --git a/app/models/account/chartable.rb b/app/models/account/chartable.rb
index aba8415c..2770da3b 100644
--- a/app/models/account/chartable.rb
+++ b/app/models/account/chartable.rb
@@ -14,6 +14,7 @@ module Account::Chartable
       ])
 
       balances = gapfill_balances(balances)
+      balances = invert_balances(balances) if favorable_direction == "down"
 
       values = [ nil, *balances ].each_cons(2).map do |prev, curr|
         Series::Value.new(
@@ -69,6 +70,13 @@ module Account::Chartable
         SQL
       end
 
+      def invert_balances(balances)
+        balances.map do |balance|
+          balance.balance = -balance.balance
+          balance
+        end
+      end
+
       def gapfill_balances(balances)
         gapfilled = []