Originally Posted by: Abadez
But how about in the key of Minors? how is the formula looks like?
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The minor scale formula is a series of major, minor & diminished chords. It's the same thing as the major scale except that the chord qualities start on a different degree.

I think if you would study this tutorial it would answer a lot of your questions.

https://www.guitartricks.com/tutorial.php?input=495
[QUOTE=Abadez]so as i have come to undertsand that all of them are like ( 1,4,5) , it seems to be by converting romans numbers are all the same, which ends as (1,4,5), is that correct?

All diatonic scales with 7 notes can be harmonized, so there will always be a 1 through 7. The upper case Roman numerals indicate major chords; the lower case Roman numerals indicate minor & diminished chords.

Scales have the order of chord qualities they have because in every case you build a triad chord on each note of the scale, using only notes from that scale.

Give that tutorial a try! ZZSmilieZZ