How can I find the sell signal in this result by ameding the code?

[lmyao99]

Dear sir
I am very appreciated for your wonderful sharing these codes. As I found this source, I think it must be a breakthrough in stock trading simulation, therefore, I tried the mode using Taiwan stocks market, for example 2330.tw. My training period is the same as this mode, and extends the trading period until May 31th,2022. The annual return is 30.24% and cumulative returns is 60.8%. As I plot the picture with buy/sell signal, and, however, I find the buying signal in the first several trading period. I am wondering that if the mode can show the sell signal when the value comes up almost 2.04X of original funds. How can I find the sell signal when the cumulative value is as twice as original fund value.
Therefore, I write this letter and hope your response. Thank you again for open my mind to see this AI strategy.
FinRL_StockTrading_NeurIPS_2018_2330.zip