I need an output of 1 if turbine N1 is increasing, and a 0 if its decreasing. Any hints??Steve

Steve,Not tested,(TURB_ENGINE_1_N1,percent) (G:Var1) > if{ 1 (>G:Var2) } els{ 0 (>G:Var2) } (TURB_ENGINE_1_N1,percent) (>G:Var1) %((G:Var2))%!d!Hope it helps,Jan"Beatus Ille Procul Negotiis"

janworked perfectlythanks a millionsteve