Hello Support

Can anyone assist me in with manipulating arrays and range bar on feed. I refer to this post in bug reports.

viewtopic.php?f=16&t=47108&p=63504&hilit=range+bar+on+feed#p63504

I am looking at macdemaonfeed2.java in the above post and would like assistance in manipulating arrays. In particular, can someone help me on how to program en ema/macd cross and print to console?

Thanks

Tin

See the following strategy to see how to detect cross of indicator lines:
https://www.dukascopy.com/wiki/#SMA_Crossover

Thanks

history.getBar requires period. Can you pls let me know how I implement this for range bar?

Thanks

T

How would you expect EMA and MACD to cross if one is drawn on chart and the other - on a separate panel?

Sorry - I was not clear

I want to report when 2 emas cross and a macd cross separately.

T

Since you basically need the same functionality for multiple line crosses, consider introducing an enum which does the job

    enum Cross {
        noCross,
        firstOvertakeScnd,
        scndOvertakeFirst;         
        
        public static Cross getCross(double firstOld, double firstNew, double scndOld, double scndNew){
            if(firstOld < scndOld && firstNew > scndNew){
                return firstOvertakeScnd;
            }
            if(scndOld < firstOld && scndNew > firstNew){
                return scndOvertakeFirst;
            }
            
            return noCross;
        }
        public String getCrossInfo (String firstLineName, String scndLineName){
            if(this == firstOvertakeScnd){
                return String.format("%s OVERTOOK %s", firstLineName, scndLineName);
            }
            if(this == scndOvertakeFirst){
                return String.format("%s OVERTOOK %s", scndLineName, firstLineName);
            }
            return String.format("%s did not cross %s", firstLineName, scndLineName);
        }
    }

And then you just call it on multiple result arrays:

 // calculate crosses 
int last = rangeBarCount - 1;
int prev = last - 1;
Cross macdCross = Cross.getCross(macd[MACD][prev], macd[MACD][last], macd[MACD_SIGNAL][prev], macd[MACD_SIGNAL][last]); 
Cross emaCross = Cross.getCross(emaFast[prev], emaFast[last], emaSlow[prev], emaSlow[last]);
print("___Cross info: %s; %s", 
    macdCross.getCrossInfo("macd", "macd signal"),
    emaCross.getCrossInfo("ema fast", "ema slow"));

Thanks very much - I will look through, test.

Best
T