hello support,

i want to get a precise value of the ema cross.see the attached file.

how to get it and how to keep in memory?

thanks you for your help.

eric

See:
https://www.dukascopy.com/wiki/#Line_intersection

hello support,

thank for your reply.

i did succesfully for ema crossing.

this is my code

for(int i=0; i< emaopen.length - 1; i++){
            PointDbl emapoint = intersection( 
                    bars[i].getTime(), emaopen[i], bars[i+1].getTime(), emaopen[i+1], 
                    bars[i].getTime(), emaclose[i], bars[i+1].getTime(), emaclose[i+1]
                    );
             
             if(emapoint != null 
             && emaclose[curr] >= emaclose[prev]
         && emaopen[curr] <= emaopen[prev]
         && emaclose[curr] >= emaopen[curr]){
         
         emacrossup = emapoint.y;
         }
         
         if(emapoint != null
         && emaclose[curr] <= emaclose[prev]
         && emaopen[curr] >= emaopen[prev]
         && emaclose[curr] <= emaopen[curr]){
                     
         emacrossdown = emapoint.y;
         }
      }

but now i would like to find the previous cross. i tried to follow this example : viewtopic.php?f=65&t=47360, but without a succes.

could you help me please?

thank
eric

The cross occurrence is undeterministic, so you just need to determine yourself what is the candle interval over which you want to check the crosses. You can increase it by increasing the value of fromShift in the Indicator output line intersection example.

sorry but it's impossible for me to do what you say if i understand correctly your answer.
i mean i would like to find the previous cross to compare with the current cross for find a divergence on cross. so the cross appear on different number of candle. sometime at 10 candles before the current cross sometime at 5 and so one.

is it possible to create a table with the crossing variable with a determinate length?
for example if the length of table is 2 when the cross occur the value of cross go to the table at the first place. when the new cross occur the first cross go to the second place in the table and the new cross at the first place.when the third cross occur, the first cross go out of the table, the second go to second place and the third go to the first place.
so when i want to compare the previous cross and the current cross i do this :

double[] crossingtable = new crossingtable(emacrossup,2,bar.getTime(),0);//the syntax isn't good it's just an idea
if (crossingtable[0] > crossingtable[1]){
buySign = true;
}

sorry it's difficult for me to explain in english. i hope is clear.
eric

Just use the second example from the wiki article, change sma to ema, increase fromShift to say 200 and fetch the values in a java.util.List where there currently a signal error gets drawn.