fix rectangles caused by stretching small x-axis

Author: coffincw

examples/renko_charts.ipynb

@@ -395,7 +395,7 @@ def _construct_renko_collections(dates, highs, lows, volumes, config_renko_param
     for i in range(len(cdiff)):
         num_bricks = abs(int(cdiff[i]))
         curr_diff_sign = cdiff[i]/abs(cdiff[i])
-        if last_diff_sign != 0 and curr_diff_sign != last_diff_sign:
+        if last_diff_sign != 0 and num_bricks > 0 and curr_diff_sign != last_diff_sign:
             num_bricks -= 1
         last_diff_sign = curr_diff_sign
 

src/mplfinance/_utils.py

@@ -314,12 +314,14 @@ def plot( data, **kwargs ):
                 retdict['mav' + str(mavgs[i])] = mavprices
 
     avg_dist_between_points = (xdates[-1] - xdates[0]) / float(len(xdates))
-    minx = xdates[0]  - avg_dist_between_points
-    maxx = xdates[-1] + avg_dist_between_points
-    miny = min([low for low in lows if low != -1])
-    maxy = max([high for high in highs if high != -1])
-    corners = (minx, miny), (maxx, maxy)
-    ax1.update_datalim(corners)
+    
+    if ptype not in VALID_PMOVE_TYPES:
+        minx = xdates[0]  - avg_dist_between_points
+        maxx = xdates[-1] + avg_dist_between_points
+        miny = min([low for low in lows if low != -1])
+        maxy = max([high for high in highs if high != -1])
+        corners = (minx, miny), (maxx, maxy)
+        ax1.update_datalim(corners)
 
     if config['volume']:
         vup,vdown = style['marketcolors']['volume'].values()