function count = getNumberOfIntersections(signal, timestamps, value)

    is_smaller_value = false;
    is_bigger_value = false;
    window_poi = [];
    window_ts = [];
    p_idx = 1;
    for j = 1:length(signal)
        %is measurement smaller?
        if(signal(j) < value)
            %was the last measurement bigger and the current smaller? 		
            if(is_bigger_value == true)
                window_poi(p_idx) = signal(j);
                window_ts(p_idx) = interp1(signal(j-1 : j),timestamps(j-1 : j),value);
                p_idx = p_idx + 1;			
            end

            is_smaller_value = true;
            is_bigger_value = false;
        else	
            %was the last measurement smaller and the current bigger?
            if(is_smaller_value == true)
                window_poi(p_idx) = signal(j);
                window_ts(p_idx) = interp1(signal(j-1 : j),timestamps(j-1 : j),value);
                p_idx = p_idx + 1;					
            end

            is_smaller_value = false;
            is_bigger_value = true;			
        end	
    end
    
    count = length(window_poi);
end