#'
#' @aliases J_Zero
#'
-getZeroJumpPredict = function(data, today, memory, horizon, params, ...)
+getZeroJumpPredict = function(data, today, memory, predict_from, horizon, params, ...)
{
list(...)$first_pred - ifelse( predict_from >= 2,
data$getSerie(today)[predict_from-1], tail(data$getSerie(today-1),1) )