Preheat your Traeger grill to 325*.
Unwrap the chicken and pat it dry with a paper towel.
On a big cutting board, flip the chicken breast side down so that the neck/spine is facing up.
Using a set of sharp kitchen shears, clip through the chicken carcass on either side of the spine (about 1.5" apart), to remove the backbone.
Flip the chicken over again and press down with both palms on the breasts, breaking the breastbone.
Press the chicken until fairly even.
Rub the chicken all over with hot sauce binder.
Then season the chicken generously with rub, being sure to get under the wing folds and on the cut side.
Place the chicken in the center of the preheated grill and insert a Meater thermometer probe in the thickest part of the breast.
Pair the thermometer with the app and set a desired temperature of 165*.
Roast the chicken in the grill until the temperature of the breast hits 165-- about 60 minutes.
Pull the chicken from the grill and tent loosely with foil while resting on a cutting board.
Using a sharp knife, carve the chicken into individual pieces and slice the breast meat to serve.