diff --git a/cli.py b/cli.py
index 0729db8..e771252 100644
--- a/cli.py
+++ b/cli.py
@@ -1,6 +1,7 @@
 import logging
 import os
 import sys
+from datetime import datetime
 
 import click
 
@@ -118,13 +119,13 @@ def fetch_all_prices():
 
 
 @cli.command()
-@click.argument("start", type=int)
-@click.argument("end", type=int)
-def fetch_range(start: int, end: int):
+@click.argument("after", type=datetime)
+@click.argument("before", type=datetime)
+def fetch_range(after: datetime, before: datetime):
     inspect_db_session = get_inspect_session()
 
     logger.info("Fetching prices")
-    prices = fetch_prices_range(start, end)
+    prices = fetch_prices_range(after, before)
 
     logger.info("Writing prices")
     write_prices(inspect_db_session, prices)
diff --git a/mev b/mev
index 2505a3b..eb81fc6 100755
--- a/mev
+++ b/mev
@@ -83,11 +83,11 @@ case "$1" in
                     poetry run fetch-all-prices
             ;;
           fetch-range)
-                start=$2
-                end=$3
+                after=$2
+                before=$3
                 echo "Running price fetch-range"
                 kubectl exec -ti deploy/mev-inspect -- \
-                    poetry run fetch-range $start $end
+                    poetry run fetch-range $after $before
             ;;
             *)
             echo "prices usage: "$1" {fetch-all}"
diff --git a/mev_inspect/prices.py b/mev_inspect/prices.py
index 1f2c3bc..8e62169 100644
--- a/mev_inspect/prices.py
+++ b/mev_inspect/prices.py
@@ -1,4 +1,4 @@
-from datetime import datetime as dt
+from datetime import datetime
 from typing import List
 
 from pycoingecko import CoinGeckoAPI
@@ -11,48 +11,44 @@ def fetch_prices() -> List[Price]:
     prices = []
 
     for token_address in TOKEN_ADDRESSES:
-        price_data = cg.get_coin_market_chart_by_id(
+        coingecko_price_data = cg.get_coin_market_chart_by_id(
             id=COINGECKO_ID_BY_ADDRESS[token_address],
             vs_currency="usd",
             days="max",
             interval="daily",
         )
-        price_time_series = price_data["prices"]
-
-        for entry in price_time_series:
-            timestamp = dt.fromtimestamp(entry[0] / 1000)
-            token_price = entry[1]
-            prices.append(
-                Price(
-                    timestamp=timestamp,
-                    usd_price=token_price,
-                    token_address=token_address,
-                )
-            )
+        prices += _build_token_prices(coingecko_price_data, token_address)
 
     return prices
 
 
-def fetch_prices_range(start: int, end: int) -> List[Price]:
-
+def fetch_prices_range(after: datetime, before: datetime) -> List[Price]:
     cg = CoinGeckoAPI()
     prices = []
+    after_unix = int(after.timestamp())
+    before_unix = int(before.timestamp())
 
     for token_address in TOKEN_ADDRESSES:
-        price_data = cg.get_coin_market_chart_range_by_id(
-            COINGECKO_ID_BY_ADDRESS[token_address], "usd", start, end
+        coingecko_price_data = cg.get_coin_market_chart_range_by_id(
+            COINGECKO_ID_BY_ADDRESS[token_address], "usd", after_unix, before_unix
         )
-        price_time_series = price_data["prices"]
 
-        for entry in price_time_series:
-            timestamp = dt.fromtimestamp(entry[0] / 1000)
-            token_price = entry[1]
-            prices.append(
-                Price(
-                    timestamp=timestamp,
-                    usd_price=token_price,
-                    token_address=token_address,
-                )
-            )
+        prices += _build_token_prices(coingecko_price_data, token_address)
 
     return prices
+
+
+def _build_token_prices(coingecko_price_data, token_address) -> List[Price]:
+    time_series = coingecko_price_data["prices"]
+    prices = []
+    for entry in time_series:
+        timestamp = datetime.fromtimestamp(entry[0] / 1000)
+        token_price = entry[1]
+        prices.append(
+            Price(
+                timestamp=timestamp,
+                usd_price=token_price,
+                token_address=token_address,
+            )
+        )
+    return prices