The Ogham (pronounced OH-wha-m) alphabet, like the Futhark alphabet, contains a great amount of hidden significance. Each letter has a color and a meaning associated with it and each letter, represented by a tree, also has a classification to show the importance of that tree. This classification, of chieftan, peasant, or shrub, has little or nothng to do with he meaning. Most letters also have an associatiion with a lunar month as shown on the tree calendar Two symbols, the Grove and the Sea, have no classification, because the Druids knew these things to be powerful in their own right.
To divine the future with the alphabet, mark one symbols each on one side of a number of flat sticks. You can also mark cards, and divine in a method similar to the Tarot. Chose seven of these sticks, or cards, without looking. Think of your question, holding the sticks in both hands, then toss them softly to the ground in front of you. The sticks closest to you mark the present, and those farther away the future. If two sticks touch, they effect each other directly.
Here are the letters and meaning of the Ogham alphabet. They are all written along a single vertical line and generally are simple to write, but the Crane Bag (the last five letters) are more complex.
Beth-Birch
Color: White
Class: Peasant
Letter: B
Meaning: New beginnings; changes; purification.
Luis-Rowan
Color: Grey and Red
Class: Peasant
Letter: L
Meaning: Controlling your life; protection against control by others.

Fearn-Alder
Color: Crimson
Class: Chieftain
Letter: F, V
Meaning: Help in making choices; spiritual guidance and protection.
Saille-Willow
Color: listed only as bright
Class: Peasant
Letter: S
Meaning: Gaining balance in your life.
Nuin-Ash
Color: grass green
Class: Cheiftan
Letter: N
Meaning: Locked into a chain of events; feeling bound.
Huathe-Hawthorn
Color: Purple
Class: Peasant
Letter: H
Meaning: Being held back for a period of time.
Duir-Oak
Color: black and dark brown
Class: Cheiftan
Letter: D
Meaning: Security; strenth
Tinne-Holly
Color: Dark grey
Class: Peasant
Letter: T
Meaning: Energy and guidance for problems to come.
Coll-Hazel
Color: Brown
Class: Cheiftan
Letter: C, k
Meaning: Creative energy for work or projects.
Quert-Apple
Color: Green
Class: Shrub
Letter: Q
Meaning: A choice must be made.
Muin-Vine
Color: Variegated
Class: Cheiftan
Letter: M
Meaning: Inner development occurring, but take time for relaxation.
Gort-Ivy
Color: Sky Blue
Class: Cheiftan
Letter: G
Meaning: Take time to soul search or you will make a wrong decision.
Ngetal-Reed
Color: Grass Green
Class: Shrub
Letter: NG
Meaning: Upsets or surprises.
Straif-Blackthorn
Color: purple
Class: chieftan
Letter: SS, Z, ST
Meaning: Resentment; confusion; refusing to see the truth.
Ruis-Elder
Color: Red
Class: Shrub
Letter: R
Meaning: End of a cycle or problem.
Ailim-Silver Fir
Color: Light Blue
Class: Shrub
Letter: A
Meaning: Learning from past mistakes; take care in choices.
Ohn-Furze
Color: yellow gold
Class: Cheiftan
Letter: O
Meaning: Information that could change your life.
Ur-Heather & Mistletoe
Color: Purple
Class: Heather is peasant; Mistletoe is cheiftan
Letter: U
Meaning: Healing and development on a spiritual level.
Eadha-White Poplar or Aspen
Color: Silver White
Class: Shrub
Letter: E
Meaning: Problems; doubts; fears.
Ioho-Yew
Color: Dark green
Class: cheiftan
Letter: I, J, Y
Meaning: Complete change in life-direction or attitude.
Koad-Grove
Color: many shades of green
Class: none
Letter: CH, KH, EA
Meaning: Wisdom gained by seeing past illusions.
Oir-Spindle
Color: white
Class: peasant
Letter: TH, OI
Meaning: Finish obligations and task or your life cannot move forward.
Uilleand-Honeysuckle
Color: yellow-white
Class: peasant
Letter: P, PE, UI
Meaning: Proceed with caution.
Phagos-Beech
Color: orange-brown
Class: cheiftan
Letter: PH, IO
Meaning: New experiences and information coming.
Mor-The Sea
Color: blue-green
Class: none
Letter: AE, X, XI
Meaning: Travel