Simple EMA Signal

Step 1.
create SimpleEMAsignal file in expert folder and

Step 2. copy paste code given below on your SimpleEMAsignal file :
//code start

void OnTick()
{
// String variable for the signal
string signal="";
//We calculate the moving average for last 20 candles
double MyMovingAverage = iMA(_Symbol,_Period ,20,0,MODE_EMA, PRICE_CLOSE,0);
// if the EMA is below the Bid price
if (MyMovingAverage<Bid)
{//create a buy signal
signal="buy";
}
// if the EMA is above the Ask price
if (MyMovingAverage>Ask)
{//create asell signal
signal="sell";
}
//Output the signal on the chart
Comment("Current Signaal is :",signal);
}//+------------------------------------------------------------------+

//code end

Step 3.

Now open MT4 and go to :

Insert >> Indicator >> Moving Average 

Set parameter : Period : 20 , shift : 0 , MA Method : Exponential , Apply to : close , style : Yellow then OK

Step 4.

Now open MT4 and go to :

Charts >> Template >> save template >> save file as tester.tpl.

Step5.

Now open MT4 and go to :

View >> strategy test : 

set your symbol

Use date

Visual Mode

Start

Step6.

View signal on left side on top in your chart.