For else error and vector integration

I am trying to convert a (for if else) condition into a vector. I am having problems running the results after because I need to redefine the different Short and Long trades to be read as directionTrade i think. not sure what I am doing incorrectly.

I need to convert: -

if dist(k,i)>0  
                  B_Short(k,i)=-1;
                  B_Long(k,p(i,1))=+1;
              else
                  B_Short(k,p(i,1))=-1;
                  B_Long(k,i)=+1;
          end

INTO......................

   for i=1:length(idx)

         if (dist(k,idx(i))>0)

                  myTrades{idxTrades,1}.directionTrade1=[-1  1];
              else
                  myTrades{idxTrades,1}.directionTrade2=[ 1 -1];

Attempted added information Below. Not sure if correct...

directionTrade1=[B_Short(k,i) B_Long(k,p(i,1))];
directionTrade2=[B_Long(k,i) B_Short(k,p(i,1))];

This is where the problem arises.

% Calculation of the Total Buy_Signs Matrix

      BsignsT(k,:)=B_Long(k,:)+B_Short(k,:);

Because it still reads B Long and B Short trades however I want to replace with the above vector else conditon. What do I need to change? and what do I need to change the name to for all recurrences of B Short and B Long in the remaining code for it to correctly read the newly changed vector and process the fucntion correctly..???