set axisbelow so grid does not show through

Author: DanielGoldfarb

examples/scratch_pad/issues/Issue156_title_ruins_tight_layout.ipynb

@@ -156,12 +156,15 @@ def _build_panels( figure, config ):
         lift   = panels['height'].loc[panid+1:].sum()
         panels.at[panid,'lift'] = lift
         if panid == 0:
+            # rect = [left, bottom, width, height] 
             ax0 = figure.add_axes( [0.15, 0.18+lift, 0.70, height] )
         else:
             ax0 = figure.add_axes( [0.15, 0.18+lift, 0.70, height], sharex=panels.at[0,'axes'][0] )
         ax1 = ax0.twinx()
         ax1.grid(False)
-        if panid == volume_panel:
+        if config['saxbelow']:      # issue#115 issuecomment-639446764
+            ax0.set_axisbelow(True) # so grid does not show through plot data on any panel.
+        elif panid == volume_panel:
             ax0.set_axisbelow(True) # so grid does not show through volume bars.
         panels.at[panid,'axes'] = (ax0,ax1)
 

src/mplfinance/_panels.py

@@ -223,6 +223,9 @@ def _valid_plot_kwargs():
 
         'return_width_config'       : { 'Default'     : None,
                                         'Validator'   : lambda value: isinstance(value,dict) and len(value)==0 },
+
+        'saxbelow'                  : { 'Default'     : True,  # Issue#115 Comment#639446764
+                                        'Validator'   : lambda value: isinstance(value,bool) },
     }
 
     _validate_vkwargs_dict(vkwargs)