strategy pivotshort: refactor and add stop EMA

[c9s]

BACK-TEST REPORT
===============================================
START TIME: Fri, 01 Apr 2022 00:00:00 UTC
END TIME: Wed, 08 Jun 2022 00:00:00 UTC
INITIAL TOTAL BALANCE: BalanceMap[ETH: 10, USDT: 3000]
FINAL TOTAL BALANCE: BalanceMap[ETH: 0.05250783, USDT: 35872.95613945]
binance ETHUSDT PROFIT AND LOSS REPORT
===============================================
TRADES SINCE: 2022-04-05 23:51:59.999 +0000 UTC
NUMBER OF TRADES: 22
AVERAGE COST: $ 1,907.45
BASE ASSET POSITION: -10.00000562
TOTAL BUY VOLUME: 70.05253372
TOTAL SELL VOLUME: 80
CURRENT PRICE: $ 1,814.21
CURRENCY FEES:
 - USDT: 132.10289997
 - ETH: 0.05253934
PROFIT: $ 13,905.81
UNREALIZED PROFIT: $ 932.38
INITIAL ASSET IN USDT ~= 35815.1000 USDT (1 ETH = 3281.51)
FINAL ASSET IN USDT ~= 35968.2163 USDT (1 ETH = 1814.21)
REALIZED PROFIT: +13905.81092495 USDT
UNREALIZED PROFIT: +932.38400289 USDT
ASSET INCREASED: +153.11636971 USDT (+0.42%)

[bbgokarma-bot]

Welcome back! @c9s, This pull request may get 401 BBG.

[bbgokarma-bot]

Re-estimated karma: this pull request may get 414 BBG

[bbgokarma-bot]

Re-estimated karma: this pull request may get 489 BBG

[bbgokarma-bot]

Re-estimated karma: this pull request may get 512 BBG

[bbgokarma-bot]

Hi @c9s,

Well done! 517 BBG has been sent to your polygon wallet. Please check the following tx:

https://polygonscan.com/tx/0x829be80073e40982028f3b85ad78b7094d4b28e64fcbbdf91c59daff81e06b70

Thank you for your contribution!