make sure y axis of singlepoint charts decrease top to bottommake sure y axis

nv.d3.js

@@ -806,7 +806,7 @@ nv.models.historicalBar = function() {
 
       if (y.domain()[0] === y.domain()[1])
         y.domain()[0] ?
-            y.domain([y.domain()[0] + y.domain()[0] * 0.01, y.domain()[1] - y.domain()[1] * 0.01])
+            y.domain([y.domain()[0] - y.domain()[0] * 0.01, y.domain()[1] + y.domain()[1] * 0.01])
           : y.domain([-1,1]);
 
       //------------------------------------------------------------
@@ -5351,7 +5351,7 @@ nv.models.multiBar = function() {
 
       if (y.domain()[0] === y.domain()[1])
         y.domain()[0] ?
-            y.domain([y.domain()[0] + y.domain()[0] * 0.01, y.domain()[1] - y.domain()[1] * 0.01])
+            y.domain([y.domain()[0] - y.domain()[0] * 0.01, y.domain()[1] + y.domain()[1] * 0.01])
           : y.domain([-1,1]);
 
 
@@ -7365,7 +7365,7 @@ nv.models.ohlcBar = function() {
 
       if (y.domain()[0] === y.domain()[1])
         y.domain()[0] ?
-            y.domain([y.domain()[0] + y.domain()[0] * 0.01, y.domain()[1] - y.domain()[1] * 0.01])
+            y.domain([y.domain()[0] - y.domain()[0] * 0.01, y.domain()[1] + y.domain()[1] * 0.01])
           : y.domain([-1,1]);
 
       //------------------------------------------------------------
@@ -8359,7 +8359,7 @@ nv.models.scatter = function() {
 
       if (y.domain()[0] === y.domain()[1])
         y.domain()[0] ?
-            y.domain([y.domain()[0] + y.domain()[0] * 0.01, y.domain()[1] - y.domain()[1] * 0.01])
+            y.domain([y.domain()[0] - y.domain()[0] * 0.01, y.domain()[1] + y.domain()[1] * 0.01])
           : y.domain([-1,1]);