It really depends on what version of MetaStock you have. If you own any version of MetaStock Profesional or MetaStock 9.0 You simply have to use the security function. Let's make an indicator as an example. I would create a Variable called V1 that will represent the price of the DOW JONES INDUSTRIAL ( Sorry I forgot what the Dow 30 symbol is :oops: ) I would Write : V1:=Security("SYMBOL", Price Array); or for this example V1:=Security(".DJI",Close); Then I can use the Variable V1 to calculate my Dow Jones Index Bollinger bands Value. The function for bollinger band top is : BBandTop(Data Array, Periods, E S T TRI VAR W, Deviations) The function for bollinger band Bottom is : BBandBot(Data Array, Periods, E S T TRI VAR W, Deviations) So I would Write : V1:=Security(".DJI",Close); BollingerTop:=BBandTop(V1, 20, E , 2) ; Then My condition is the price of the index crosses above the Top Bollinger band My final code would be : V1:=Security(".DJI",Close); BollingerTop:=BBandTop(V1, 20, E , 2) ; Cross(V1,BollingerTop) That's it, now apply this indicator on any chart you want. I know this might be confusing so do not hesitate to ask any questions you might have. Hope this helps :D