mql5 Draw_filling type indicator span not displaying

I am trying to get my indicator, to, among other things, display the next likely support and resistance levels as a coloured band. The buffers placed above the DRAW_FILL declarations behave as expected, and the support levels display, but not the resistance levels. The values are correctly set in the buffers as seen in the data window. Can anyone see what is wrong? Extracts from the top of the code and OnInit() are below.

#property indicator_buffers 16
#property indicator_plots 6

//SPs
#property indicator_color1 clrYellow,clrViolet
#property indicator_type1 DRAW_COLOR_ARROW
#property indicator_color2 clrYellow,clrViolet
#property indicator_type2 DRAW_COLOR_ARROW
//TrendBase
#property indicator_color3 clrGray
#property indicator_type3 DRAW_LINE
//Trend Limit
#property indicator_color4 clrAliceBlue
#property indicator_type4 DRAW_LINE
//resistance band
#property indicator_color5 clrRed
#property indicator_type5 DRAW_FILLING
//support band
#property indicator_color6 clrGreen
#property indicator_type6 DRAW_FILLING

#property indicator_label1 "SH_Points"
#property indicator_label2 "SL_Points"
#property indicator_label3 "TrendBase"
#property indicator_label4 "TrendLimit"
#property indicator_label5 "Next_Resistance_Span"
#property indicator_label6 "Next_Support_Span"

#property indicator_width1 4
#property indicator_width2 4
#property indicator_width3 1
#property indicator_width4 1
#property indicator_width5 1
#property indicator_width6 1

OnInit()
{
// swing points indicated by a small square
SetIndexBuffer(0,SH_Points,INDICATOR_DATA);
PlotIndexSetInteger(0,PLOT_ARROW,250);
PlotIndexSetInteger(0,PLOT_COLOR_INDEXES,2);
SetIndexBuffer(1,SH_Points_color,INDICATOR_COLOR_INDEX);
PlotIndexSetInteger(1,PLOT_ARROW,250);

SetIndexBuffer(2,SL_Points,INDICATOR_DATA);
PlotIndexSetInteger(2,PLOT_ARROW,250);
PlotIndexSetInteger(2,PLOT_COLOR_INDEXES,2);
SetIndexBuffer(3,SL_Points_color,INDICATOR_COLOR_INDEX);
PlotIndexSetInteger(3,PLOT_ARROW,250);

SetIndexBuffer(4,TrendBase,INDICATOR_DATA);
SetIndexBuffer(5,TrendLimit,INDICATOR_DATA);

SetIndexBuffer(6,Next_Resistance_Span,INDICATOR_DATA);
SetIndexBuffer(7,Next_Resistance,INDICATOR_DATA);
SetIndexBuffer(8,Next_Support_Span,INDICATOR_DATA);
SetIndexBuffer(9,Next_Support,INDICATOR_DATA);

// buffers for data storage only
SetIndexBuffer(10,SH_Levels,INDICATOR_CALCULATIONS);
SetIndexBuffer(11,SL_Levels,INDICATOR_CALCULATIONS);
SetIndexBuffer(12,RoundedO,INDICATOR_CALCULATIONS);
SetIndexBuffer(13,RoundedH,INDICATOR_CALCULATIONS);
SetIndexBuffer(14,RoundedL,INDICATOR_CALCULATIONS);
SetIndexBuffer(15,RoundedC,INDICATOR_CALCULATIONS);

PlotIndexSetDouble(0,PLOT_EMPTY_VALUE,EMPTY_VALUE);
PlotIndexSetDouble(1,PLOT_EMPTY_VALUE,EMPTY_VALUE);
PlotIndexSetDouble(2,PLOT_EMPTY_VALUE,EMPTY_VALUE);
PlotIndexSetDouble(3,PLOT_EMPTY_VALUE,EMPTY_VALUE);
PlotIndexSetDouble(4,PLOT_EMPTY_VALUE,EMPTY_VALUE);
PlotIndexSetDouble(5,PLOT_EMPTY_VALUE,EMPTY_VALUE);
PlotIndexSetDouble(6,PLOT_EMPTY_VALUE,0);
PlotIndexSetDouble(7,PLOT_EMPTY_VALUE,0);
PlotIndexSetDouble(8,PLOT_EMPTY_VALUE,0);
PlotIndexSetDouble(9,PLOT_EMPTY_VALUE,0);
PlotIndexSetDouble(10,PLOT_EMPTY_VALUE,EMPTY_VALUE);
PlotIndexSetDouble(11,PLOT_EMPTY_VALUE,EMPTY_VALUE);
PlotIndexSetDouble(12,PLOT_EMPTY_VALUE,EMPTY_VALUE);
PlotIndexSetDouble(13,PLOT_EMPTY_VALUE,EMPTY_VALUE);
PlotIndexSetDouble(14,PLOT_EMPTY_VALUE,EMPTY_VALUE);
PlotIndexSetDouble(15,PLOT_EMPTY_VALUE,EMPTY_VALUE);
}