Long only EMA CROSS 8/50/200 Backtest

Improve EMA CROSS 8/50/200 with adjustable Exit EMA Level, and can open trade only when above EMA200

版本注释:

fix some confuse title

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Add Backtest time frame, the commission fee set at 0.1% with 1000 initial capital.

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update graph using 50% of the total cap starting from 2021-01-01