Handle end_date with CCXT source when loading crypto (#4296)

* Handle `end_date` with `CCXT` source when loading crypto

* Fix linting

* Fix linting

* Improve code readability

* Final linting

---------

Co-authored-by: James Maslek <jmaslek11@gmail.com>

openbb_terminal/cryptocurrency/cryptocurrency_helpers.py

@@ -325,6 +325,7 @@ def load_from_ccxt(
     interval: str = "1440",
     exchange: str = "binance",
     to_symbol: str = "usdt",
+    end_date: datetime = datetime.now(),
 ) -> pd.DataFrame:
     """Load crypto currency data [Source: https://github.com/ccxt/ccxt]
 
@@ -341,6 +342,8 @@ def load_from_ccxt(
         The exchange to get data from.
     to_symbol: str
         Quote Currency (Defaults to usdt)
+    end_date: datetime
+        The datetime to stop at
 
     Returns
     -------
@@ -351,6 +354,11 @@ def load_from_ccxt(
     pair = f"{symbol.upper()}/{to_symbol.upper()}"
 
     try:
+        if interval not in list(CCXT_INTERVAL_MAP):
+            console.print(
+                f"\nInvalid interval chosen for source, "
+                f"available intervals: {', '.join(list(CCXT_INTERVAL_MAP))}\n"
+            )
         df = fetch_ccxt_ohlc(
             exchange,
             3,
@@ -362,6 +370,19 @@ def load_from_ccxt(
         if df.empty:
             console.print(f"\nPair {pair} not found in {exchange}\n")
             return pd.DataFrame()
+        i = 0
+        for date in df.index:
+            if date > end_date:
+                break
+            i += 1
+        first_date = pd.to_datetime(str(df.index.values[0]))
+        df = df.iloc[0:i]
+        if df.empty:
+            console.print(
+                f"\nThe first data point retrieved was {first_date.strftime('%Y-%m-%d')}, "
+                f"thus the end date ({end_date.strftime('%Y-%m-%d')}) filtered out all of the data.\n"
+            )
+            return pd.DataFrame()
     except Exception:
         console.print(f"\nPair {pair} not found on {exchange}\n")
         return df
@@ -537,7 +558,9 @@ def load(
     end_date = check_datetime(end_date, start=False)
 
     if source == "CCXT":
-        return load_from_ccxt(symbol, start_date, interval, exchange, to_symbol)
+        return load_from_ccxt(
+            symbol, start_date, interval, exchange, to_symbol, end_date
+        )
     if source == "CoinGecko":
         return load_from_coingecko(symbol, start_date, to_symbol)
     if source == "YahooFinance":