REFACTOR: [dca2] refactor dca2 strategy to make it can back testing

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 22 lines in your changes are missing coverage. Please review.

Project coverage is 22.58%. Comparing base (b6e7c48) to head (e856727). Report is 22 commits behind head on main.

Additional details and impacted files

[](https://app.codecov.io/gh/c9s/bbgo/pull/1629?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Yo-An+Lin) ```diff @@ Coverage Diff @@ ## main #1629 +/- ## ======================================= Coverage 22.58% 22.58% ======================================= Files 621 621 Lines 45010 44982 -28 ======================================= - Hits 10164 10161 -3 + Misses 34112 34085 -27 - Partials 734 736 +2 ``` | [Files](https://app.codecov.io/gh/c9s/bbgo/pull/1629?dropdown=coverage&src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Yo-An+Lin) | Coverage Δ | | |---|---|---| | [pkg/strategy/dca2/open\_position.go](https://app.codecov.io/gh/c9s/bbgo/pull/1629?src=pr&el=tree&filepath=pkg%2Fstrategy%2Fdca2%2Fopen_position.go&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Yo-An+Lin#diff-cGtnL3N0cmF0ZWd5L2RjYTIvb3Blbl9wb3NpdGlvbi5nbw==) | `53.84% <ø> (+6.11%)` | :arrow_up: | | [pkg/strategy/dca2/state.go](https://app.codecov.io/gh/c9s/bbgo/pull/1629?src=pr&el=tree&filepath=pkg%2Fstrategy%2Fdca2%2Fstate.go&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Yo-An+Lin#diff-cGtnL3N0cmF0ZWd5L2RjYTIvc3RhdGUuZ28=) | `0.00% <0.00%> (ø)` | | | [pkg/strategy/dca2/strategy.go](https://app.codecov.io/gh/c9s/bbgo/pull/1629?src=pr&el=tree&filepath=pkg%2Fstrategy%2Fdca2%2Fstrategy.go&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Yo-An+Lin#diff-cGtnL3N0cmF0ZWd5L2RjYTIvc3RyYXRlZ3kuZ28=) | `0.67% <0.00%> (-0.02%)` | :arrow_down: | ... and [4 files with indirect coverage changes](https://app.codecov.io/gh/c9s/bbgo/pull/1629/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Yo-An+Lin) ------ [Continue to review full report in Codecov by Sentry](https://app.codecov.io/gh/c9s/bbgo/pull/1629?dropdown=coverage&src=pr&el=continue&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Yo-An+Lin). > **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Yo-An+Lin) > `Δ = absolute (impact)`, `ø = not affected`, `? = missing data` > Powered by [Codecov](https://app.codecov.io/gh/c9s/bbgo/pull/1629?dropdown=coverage&src=pr&el=footer&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Yo-An+Lin). Last update [1e41645...e856727](https://app.codecov.io/gh/c9s/bbgo/pull/1629?dropdown=coverage&src=pr&el=lastupdated&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Yo-An+Lin). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Yo-An+Lin).