Way off. You need to learn the difference between vars, var, and int.

Also, read the manual and verify what each function returns, and why.

For example, asset() does **not** return a vars.

Code
function run()
{
	asset("EUR/USD");
	vars c_euro= series(price());
	int shortma = 20;
	vars euro_ema= series(EMA(c_euro,shortma));
	vars euro = series(c_euro[0]/ euro_ema[0]);
}

www.vitaltrades.com - andrew@vitaltrades.com