Whisk together the lime juice, orange juice, shallots, honey, salt, and pepper. Slowly whisk in the olive oil, whisking constantly, to form an emulsion.
Place the lettuces, watermelon, berries, and feta t in a large bowl. Drizzle with enough vinaigrette to coat the greens lightly and toss well. Top with candied pecans. Taste for seasonings and serve immediately.