This is how I usual do my ponytails because my hair is too heavy, but seeing a tutorial for it makes me feel fancy :)
Mix a tsp of apple cider vinegar and a teaspoon of glycerin. Mix the ingredients until smooth. Mix in a beaten egg. Mix well. Add 2 Tablespoons of caster oil. Thoroughly mix. Apply the mask on the entire length of the hair. Place the plastic cap and wrap your head with a towel. Leave the mask on your hair for 2 hours. After wash your hair using shampoo. The mask should be done 2 times a week. Do this for 1 month. After 1 month, you can make masks for prevention Apply 1 time in 2 weeks.
mix 1 tsp of apple cider vinegar with a tsp of glycerin, mix til smooth. mix in a beaten egg, add 2 T of caster oil. mix. apply on entire length of hair, place plastic cap on head and wrap with towel. leave in for 2 hours. after wash your hair with shampoo. repeat 2 times a week for a month. after 1 month, you can apply 1 time in 2 weeks, for prevention.