Absence of close price in state in FinRL_MultiCrypto_Trading.ipynb

The code below does not contain any information about the crypto pair price at all. Is there any reason for that?
In StockTradingEnv it does.

```
def get_state(self):
state = np.hstack((self.cash * 2 ** -18, self.stocks * 2 ** -3))
for i in range(self.lookback):
tech_i = self.tech_array[self.time-i]
normalized_tech_i = tech_i * 2 ** -15
state = np.hstack((state, normalized_tech_i)).astype(np.float32)
return state

```