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Hello,
One of the conditions is the Hull moving average has to be blue for buy and red for sell. There are three colors in the input section. Not sure how to choose/use the mode. Any help is appreciated.

//| HMA.mq4 |
//| Copyright ?2004, MetaQuotes Software Corp. |
//| http://www.metaquotes.net/ |
//+------------------------------------------------------------------

#property copyright "Copyright ?2004, MetaQuotes Software Corp."
#property link "http://www.metaquotes.net/"

//---- indicator settings
#property indicator_chart_window
#property indicator_buffers 3
#property indicator_color1 Pink
#property indicator_color2 Yellow
#property indicator_color3 LightGreen

//---- indicator parameters
extern int HMA_Period=20;

//---- indicator buffers
double ind_buffer0[];
double ind_buffer1[];
double ind_buffer2[];
double buffer[];

int draw_begin0;

//+------------------------------------------------------------------

//| Custom indicator initialization function |
//+------------------------------------------------------------------

int init()
{
//---- indicator buffers mapping
IndicatorBuffers(4);
if(!SetIndexBuffer(0,ind_buffer0) && !SetIndexBuffer(1,ind_buffer1)
&& !SetIndexBuffer(2,ind_buffer2) && !SetIndexBuffer(3, buffer))
Print("cannot set indicator buffers!");
// ArraySetAsSeries(ind_buffer1,true);
//---- drawing settings
SetIndexStyle(0,DRAW_LINE,STYLE_SOLID,1);
SetIndexStyle(1,DRAW_LINE,STYLE_SOLID,1);
SetIndexStyle(2,DRAW_LINE,STYLE_SOLID,1);
draw_begin0=HMA_Period+MathFloor(MathSqrt(HMA_Period));
SetIndexDrawBegin(0,draw_begin0);
SetIndexDrawBegin(1,draw_begin0);
SetIndexDrawBegin(2,draw_begin0);
IndicatorDigits(MarketInfo(Symbol(),MODE_DIGITS)+1);
//---- name for DataWindow and indicator subwindow label
IndicatorShortName("HMA("+HMA_Period+")");
SetIndexLabel(0,"Hull Moving Average");
//---- initialization done
return(0);
}
//+------------------------------------------------------------------

//| Moving Averages Convergence/Divergence |
//+------------------------------------------------------------------

int start()
{
int limit,i;
int counted_bars=IndicatorCounted();
double tmp, tmpPrevious;

//---- check for possible errors
if(counted_bars<1)
{
for(i=1;i<=draw_begin0;i++) buffer[Bars-i]=0;
for(i=1;i<=HMA_Period;i++)
{
ind_buffer0[Bars-i]=0;
ind_buffer1[Bars-i]=0;
ind_buffer2[Bars-i]=0;
}
}
//---- last counted bar will be recounted
if(counted_bars>0) counted_bars--;
limit=Bars-counted_bars;
//---- MA difference counted in the 1-st buffer
for(i=0; i<limit; i++)
{

buffer[i]=iMA(NULL,0,MathFloor
(HMA_Period/2),0,MODE_LWMA,PRICE_CLOSE,i)*2-
iMA(NULL,0,HMA_Period,0,MODE_LWMA,PRICE_CLOSE,i);
}
//---- HMA counted in the 0-th buffer
tmp=iMAOnArray(buffer,0,MathFloor(MathSqrt
(HMA_Period)),0,MODE_LWMA,0);

for(i=1; i<limit; i++)
{

tmpPrevious=iMAOnArray(buffer,0,MathFloor(MathSqrt
(HMA_Period)),0,MODE_LWMA,i);

if (tmpPrevious > tmp)
{
ind_buffer0[i] = EMPTY_VALUE;
ind_buffer1[i] = EMPTY_VALUE;
ind_buffer2[i] = tmpPrevious;
ind_buffer2[i-1] = tmp; // !
}
else if (tmpPrevious < tmp)
{
ind_buffer0[i] = tmpPrevious;
ind_buffer0[i-1] = tmp; // !
ind_buffer1[i] = EMPTY_VALUE;
ind_buffer2[i] = EMPTY_VALUE;
}
else
{
ind_buffer0[i] = CLR_NONE;
ind_buffer1[i] = tmpPrevious;
ind_buffer2[i-1] = tmp; // !
ind_buffer2[i] = CLR_NONE;
}
tmp = tmpPrevious;
}
//---- done
return(0);
}

blue? red? the indicator you posted has 3 signals pink, yellow and green

#property indicator_color1 Pink
#property indicator_color2 Yellow
#property indicator_color3 LightGreen

Pink is mode 0
Yellow is mode 1
Lightgreen is mode 2

You see one line in the screen that is made of 3 lines. Only one is plotted at a time (the other 2 signals do not have any value. Technically their value is EMPTY_VALUE)

When creating the signals you need to take that into account so conditions may be like:
For pink color - indicator mode 0 (pink), shift 0 < 100000 (this means it is plotting a pink line)

You may want to read this viewtopic.php?f=3&t=162&start=0