'Unassigned Local variable' Error in 'ATR Trailing Stops' indicator

[KLG08]

The "Indicator as described in Sylvain Vervoort's 'Average True Range Trailing Stops' June 2009 S&C article."
works great!! However I'm trying to add a second condition to it with a CrossAbove an EMA(period) indicator & I can't resolve the 'Unassigned Local variable' Error for the variable 'trail'. The standard ATR script runs just fine. What am I doing wrong?
[CODE]
{
#region Variables
privateint period = 20;
privatedouble multi = 3.5;
privatedouble trail = 1;//I tride to assign the variable here.
#endregion
///<summary>

protectedoverridevoid OnBarUpdate()
{
if (CurrentBar < 1)
return;
double trail;
double loss = ATR(Input, Period)[0] * Multi;

if (Close[0] > Value[1] && Close[1] > Value[1])
trail = Math.Max(Value[1], Close[0] - loss);
***if (CrossAbove(trail, EMA(period), 1)); //This is where I get the ERROR saying "Unassigned Local variable 'trail'

[roonius]

The "Indicator as described in Sylvain Vervoort's 'Average True Range Trailing Stops' June 2009 S&C article."
works great!! However I'm trying to add a second condition to it with a CrossAbove an EMA(period) indicator & I can't resolve the 'Unassigned Local variable' Error for the variable 'trail'. The standard ATR script runs just fine. What am I doing wrong?
[CODE]
{
#region Variables
privateint period = 20;
privatedouble multi = 3.5;
privatedouble trail = 1;//I tride to assign the variable here.
#endregion
///<summary>

protectedoverridevoid OnBarUpdate()
{
if (CurrentBar < 1)
return;
double trail;
double loss = ATR(Input, Period)[0] * Multi;

if (Close[0] > Value[1] && Close[1] > Value[1])
trail = Math.Max(Value[1], Close[0] - loss);
***if (CrossAbove(trail, EMA(period), 1)); //This is where I get the ERROR saying "Unassigned Local variable 'trail'

on a bar #2 you are trying to access Value[1] which is not defined. May be this will help:

Set Value before returning

if(CurrentBar < 1)
{
Value.Set(something);
return;
}