issue 425 support per symbol dte configuration

[noamagiv]

support DTE per symbol, same flow as target_delta.

1. add new validation under symbol and symbol.right
2. create get_target_dte in util (as get_target_delta)
3. update find_eligible_contracts in portfolio_manager

test with
[symbols.XLE]
weight = 0.10
delta = 0.3
#write_threshold = 0.01
dte = 80

[symbols.BITO]
weight = 0.15
delta = 0.3

[brndnmtthws]

This is a good start, and I appreciate the submission.

I think we need to update/document this in thetagang.toml, then we're good to go.

It's a bit confusing that we can specify dte separately for puts/calls, but max_dte is only per-symbol, so I think that should get sorted out at some point but it can be in a separate PR.

Ideally there we be a per-symbol value (like with max_dte) which applies to both puts and calls, and then an override for each contract type that takes precedence over everything else. That will be backward-compatible, and give enough flexibility to do whatever you want.

[noamagiv]

document change in toml.
you're right, DTE and max DTE behavior should be aligned, I'll change it and commit to this PR.

[noamagiv]

Sorry about the mess, it was my first contribution :)

[brndnmtthws]

You need to fix the formatting issues, which you can do with the black tool. You can also install the git hooks as noted here. To run black manually, do poetry install && poetry run black .

[brndnmtthws]

You need to resolve the conflicts, which I think should be trivial, then we're good to go

[noamagiv]

You need to resolve the conflicts, which I think should be trivial, then we're good to go

Which conflicts?

[brndnmtthws]

You need to either merge the main branch into your branch, or rebase your branch onto main. You can pull from main with git pull https://github.com/brndnmtthws/thetagang.git main.

GitHub provides two guides on how to do this if you're not familiar:

https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/addressing-merge-conflicts/resolving-a-merge-conflict-on-github
https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/addressing-merge-conflicts/resolving-a-merge-conflict-using-the-command-line

[noamagiv]

Thanks, I appreciate you're patience!
I've tried to rebase or merge and got this error :

noam@TATPS:~/dev/thetagang$ git pull https://github.com/brndnmtthws/thetagang.git main merge
fatal: couldn't find remote ref merge

I synced my breach with main changes from github with sync fork and it updated my PR, I hope it's ok.

It's strange, I followed the docs that you sent and I didn't saw any conflict error, just that main in ahead my branch so I just synced it.