If I have a Custom Indicator Statement such as: x=iCCI(Null,7,0,0,0); How do I get the value of x, 1 bar back????

If I code this as x=iCCI(Null,7,0,0,1); I get a value of one stair-step back, not one bar back value of the CCI??

Please help me!!!!!!!!!!!!!!!!!!

Dave