feature: strategy/bolllmaker trend ema

[c9s]

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[codecov]

Codecov Report

Merging #932 (7b68e5e) into main (3c4bad6) will decrease coverage by 0.01%.
The diff coverage is 0.00%.

❗ Current head 7b68e5e differs from pull request most recent head db94b26. Consider uploading reports for the commit db94b26 to get more accurate results

@@            Coverage Diff             @@
##             main     #932      +/-   ##
==========================================
- Coverage   20.02%   20.01%   -0.02%     
==========================================
  Files         410      410              
  Lines       30616    30632      +16     
==========================================
  Hits         6130     6130              
- Misses      23899    23914      +15     
- Partials      587      588       +1     

Impacted Files	Coverage Δ
pkg/bbgo/order_executor_general.go	18.99% <0.00%> (-0.33%)	⬇️
pkg/strategy/bollmaker/strategy.go	2.89% <0.00%> (-0.12%)	⬇️

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