fix: many minor fixes

[c9s]

No description provided.

[codecov]

Codecov Report

Merging #868 (9867aa9) into main (1cd4817) will decrease coverage by 0.04%.
The diff coverage is 7.77%.

@@            Coverage Diff             @@
##             main     #868      +/-   ##
==========================================
- Coverage   19.90%   19.86%   -0.05%     
==========================================
  Files         379      381       +2     
  Lines       28690    28779      +89     
==========================================
+ Hits         5712     5718       +6     
- Misses      22442    22524      +82     
- Partials      536      537       +1     

Impacted Files	Coverage Δ
pkg/bbgo/activeorderbook.go	5.46% <0.00%> (-0.37%)	⬇️
pkg/exchange/max/exchange.go	0.00% <0.00%> (ø)
pkg/types/currencies.go	0.00% <0.00%> (ø)
pkg/types/exchange.go	0.00% <ø> (ø)
pkg/types/kline.go	5.12% <0.00%> (ø)
pkg/types/order.go	2.01% <0.00%> (-0.25%)	⬇️
pkg/types/orderbook.go	0.00% <0.00%> (ø)
pkg/types/profit.go	0.00% <0.00%> (ø)
pkg/types/rbtree.go	86.95% <0.00%> (-0.55%)	⬇️
pkg/types/side.go	0.00% <0.00%> (ø)
... and 6 more

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