According to Trinitarianism, is Jesus God Almighty? First of all I want a Trinitarian answer.

Is it proper to say that Jesus is God Almighty? The Scriptures are very clear but they (and the church fathers) are very clear that the Father is God Almighty and they never call Jesus "Almighty". I struggle to understand the doctrine of the Trinity...I know that the Father is God, the Son is God and the Holy Spirit is God and they are distinct persons, but I struggle to understand how they can be "one being". 

I see that the scriptures teach an economic trinity, that the Son comes from the Father, eternally being born of the Father and he shares his substance of being God. But the Son is not as Almighty as the Father since his will is fully dependent on the will of the Father, and his existence comes from the Father eternally. And the Holy Spirit comes from the Father and the Son eternally. 
Is this an orthodox understanding of the trinity? And yet the problem is...how can the Father, Son and Holy Spirit be one God since they all come from the Almighty God, the Father?

Please don't call me a heretic...I am just trying to understand the truth. If someone can prove any other way of understanding the Trinity, in harmony with the Scriptures, I am open to change my understanding. 
God bless!

EDIT : Tertullian : 


  We, however, as we indeed always have done and more especially since we have been better instructed by the Paraclete, who leads men indeed into all truth, believe that there is one only God, but under the following dispensation [economy], as it is called, that this one only God has also a Son, His Word, who proceeded from Himself, by whom all things were  made, and without whom nothing was made. Him we believe to have been sent by the Father into the Virgin, and to have been born of her – being both Man and God, the Son of Man and the Son of God, and to have been called by the name of Jesus Christ; we believe Him to have suffered, died, and been buried, according to the Scriptures, and, after He had been raised again by the Father and taken back to heaven, to be sitting at the right hand of the Father, and that He will come to judge the quick and the dead; who sent also from heaven from the Father, according to His own promise, the Holy Ghost, the Paraclete, the sanctifier of the faith of those who believe in the Father, and in the Son, and in the Holy Ghost. That this rule of faith has come down to us from the beginning of the gospel.”


From this I understand that the Father is the One True God (THE BEING of God) and he shares the same being to the Son and the Holy Spirit
Yes. Within the text of the “Athanasian Creed” is the following statement:

Similarly, the Father is Almighty (omnipotent); the Son is Almighty (omnipotent); [and] the Holy Spirit is Almighty (omnipotent). And yet, there are not three Almighties (omnipotents), but one Almighty (omnipotent).
Similiter omnipotens Pater, omnipotens Filius, omnipotens [et] Spiritus Sanctus. Et tamen non tres omnipotentes, sed unus omnipotens.