Hi bt The short answer is yes, but quite possibly not the way you are thinking. The first thing I think you need to understand is the purely sequential nature of the MetaStock Formula Language (MFL). With the possible exception of the PREV function a series of MS functions can only proceed from first to last. There is no Jump, Branch or other functions that allow the execution order of a series of functions or commands to take a different or alternative route. The If() function allows some decisions to be made, but the result cannot affect the instruction sequence prior to the current point of execution. This same sequence applies to indicators, data bars, securities or whatever. PREV does allow for an interruption to the bar sequence, but it cannot direct the sequence or flow of instructions back beyond the PREVious bar. So what you need to do is incorporate your two indicators into one so that the second series of instructions (or functions etc.) can invert or otherwise modify the first series of instructions. Put another way, you probably need to create the two alternative or inverse results, and then with the third section of code make a selection between the two (or more) alternatives. You cannot change the result of one indicator by a subsequent action, but you can prepare the subsequent action decision by first creating the two alternatives results and then make the decision as to which course to take. As a MetaStock user for over 15 years the two most important things I've discovered are that 1. Everything in MetaStock (apart from PREV) is purely sequential, and 2. most often there is more than one solution to every problem. If you have the ability to write DLLs then you can create solutions that are way beyond the ordinary user. For the rest of us, however, we must forget what we think we know about other programming languages, and then focus on what can be done with MetaStock rather than what can't. So pack your code into 1, 2 or however many indicators you need and figure out how to get your sequence of functions into its proper order. Roy

Hi nt I'm not clear on what you're trying to achieve with "axis inversion", but lets suppose that your indicator generates a signal that swings between extremes of +100 and -100 (and all areas in between). You cannot then somehow go back and modify the indicator so that it inverts itself and then plots negative rather than positive at certain points, or vice versa. What you can do is call that indicator using the Fml() function (in a new indicator), and then use the new indicator to invert the value of the original indicator by applying appropriate logic. Or you can build the reversing element into the original indicator once the basic result has been created. As far as I'm aware there's no way to invert the Y axis of any chart, or for that matter reverse the X axis. But you do have control over your custom indicators. Try flow-charting the steps that your procedure needs to take. Such a chart cannot loop back on itself, but decisions to take a different path towards a final result are allowed. Branches back to an earlier point in the sequence, however, are not possible. I'm not sure if this all this is helpful as I'm struggling to understand the situation you're trying to work through. Roy