crape myrtle. Lagerstroemia indica

Hi, when is the right time to wire this branches? should i wait a week? is this good in two trunk style?

The correct spelling is Lagerstroemia. I don't know about the rest of the tree, but I would correct that right angle elbow over on the right.
Iris

Iris, shoul i remove it?

I would remove it just past that first bud. You also need to snip away those two roots that cross over the tops of other roots (and any in the back, too). Next time you repot, I'd suggest planting it a little deeper, so the roots are lying on and in the soil not sitting on top of it.

As for wiring those branches, they're still pretty tender. I think I would cut them all back to 2 or 3 pairs of leaves then let then grow. Don't think of wiring them until the wood had lignified and the branches are harder.

Crape myrtle are one of the most satisfying trees to work with as bonsai. The have flowers, lovely exfoliating bark, and great fall color. And, after they're well into bonsaihood, they have great ramification to show off in winter.

You should have a nice one here in a couple of years.

Jim, next week i'll do the job. then will post. thanks for the ideas. Crape Myrtle got flowers in every new branche. Maybe should i put some fertilizer? osmocote 10-10-10 is good?

10-10-10 or similar is fine, but I don't care for the Osmocoat. It is OK in flower beds, but for bonsai, when we want to KNOW when our trees get dosed with nutrients, these timed release fertilizers are just too haphazard. Get a standard houseplant fertilizer (the kind you dissolve in water) and use that.

jim, would you please suggest me a fertilizer? here, in brazil we can find Basacoat, osmocoat, peters(blue powder that we dissolve into water) npk, and organic ones...
So, osmocoat is not good for bonsai right? they don't release the food in time?