diff --git a/config_examples/config_full.example.json b/config_examples/config_full.example.json
index 64e5b76ea..42c05eaf5 100644
--- a/config_examples/config_full.example.json
+++ b/config_examples/config_full.example.json
@@ -206,6 +206,6 @@
     "recursive_strategy_search": false,
     "add_config_files": [],
     "reduce_df_footprint": false,
-    "dataformat_ohlcv": "json",
-    "dataformat_trades": "jsongz"
+    "dataformat_ohlcv": "feather",
+    "dataformat_trades": "feather"
 }
diff --git a/freqtrade/constants.py b/freqtrade/constants.py
index 3b09b4eae..caa0b44f0 100644
--- a/freqtrade/constants.py
+++ b/freqtrade/constants.py
@@ -446,12 +446,12 @@ CONF_SCHEMA = {
         'dataformat_ohlcv': {
             'type': 'string',
             'enum': AVAILABLE_DATAHANDLERS,
-            'default': 'json'
+            'default': 'feather'
         },
         'dataformat_trades': {
             'type': 'string',
             'enum': AVAILABLE_DATAHANDLERS_TRADES,
-            'default': 'jsongz'
+            'default': 'feather'
         },
         'position_adjustment_enable': {'type': 'boolean'},
         'max_entry_position_adjustment': {'type': ['integer', 'number'], 'minimum': -1},
diff --git a/freqtrade/data/dataprovider.py b/freqtrade/data/dataprovider.py
index d05ee5db7..cea0b23ef 100644
--- a/freqtrade/data/dataprovider.py
+++ b/freqtrade/data/dataprovider.py
@@ -310,7 +310,7 @@ class DataProvider:
                 timeframe=timeframe or self._config['timeframe'],
                 datadir=self._config['datadir'],
                 timerange=timerange,
-                data_format=self._config.get('dataformat_ohlcv', 'json'),
+                data_format=self._config.get('dataformat_ohlcv', 'feather'),
                 candle_type=_candle_type,
 
             )
diff --git a/freqtrade/data/history/history_utils.py b/freqtrade/data/history/history_utils.py
index 39556889e..1a500d65c 100644
--- a/freqtrade/data/history/history_utils.py
+++ b/freqtrade/data/history/history_utils.py
@@ -69,7 +69,7 @@ def load_data(datadir: Path,
               fill_up_missing: bool = True,
               startup_candles: int = 0,
               fail_without_data: bool = False,
-              data_format: str = 'json',
+              data_format: str = 'feather',
               candle_type: CandleType = CandleType.SPOT,
               user_futures_funding_rate: Optional[int] = None,
               ) -> Dict[str, DataFrame]:
@@ -394,7 +394,7 @@ def _download_trades_history(exchange: Exchange,
 
 def refresh_backtest_trades_data(exchange: Exchange, pairs: List[str], datadir: Path,
                                  timerange: TimeRange, new_pairs_days: int = 30,
-                                 erase: bool = False, data_format: str = 'jsongz') -> List[str]:
+                                 erase: bool = False, data_format: str = 'feather') -> List[str]:
     """
     Refresh stored trades data for backtesting and hyperopt operations.
     Used by freqtrade download-data subcommand.
@@ -427,8 +427,8 @@ def convert_trades_to_ohlcv(
     datadir: Path,
     timerange: TimeRange,
     erase: bool = False,
-    data_format_ohlcv: str = 'json',
-    data_format_trades: str = 'jsongz',
+    data_format_ohlcv: str = 'feather',
+    data_format_trades: str = 'feather',
     candle_type: CandleType = CandleType.SPOT
 ) -> None:
     """
diff --git a/freqtrade/edge/edge_positioning.py b/freqtrade/edge/edge_positioning.py
index f2df0d3f2..3e7fa2156 100644
--- a/freqtrade/edge/edge_positioning.py
+++ b/freqtrade/edge/edge_positioning.py
@@ -115,7 +115,7 @@ class Edge:
                 exchange=self.exchange,
                 timeframe=self.strategy.timeframe,
                 timerange=timerange_startup,
-                data_format=self.config.get('dataformat_ohlcv', 'json'),
+                data_format=self.config.get('dataformat_ohlcv', 'feather'),
                 candle_type=self.config.get('candle_type_def', CandleType.SPOT),
             )
             # Download informative pairs too
@@ -132,7 +132,7 @@ class Edge:
                     exchange=self.exchange,
                     timeframe=timeframe,
                     timerange=timerange_startup,
-                    data_format=self.config.get('dataformat_ohlcv', 'json'),
+                    data_format=self.config.get('dataformat_ohlcv', 'feather'),
                     candle_type=self.config.get('candle_type_def', CandleType.SPOT),
                 )
 
@@ -142,7 +142,7 @@ class Edge:
             timeframe=self.strategy.timeframe,
             timerange=self._timerange,
             startup_candles=self.strategy.startup_candle_count,
-            data_format=self.config.get('dataformat_ohlcv', 'json'),
+            data_format=self.config.get('dataformat_ohlcv', 'feather'),
             candle_type=self.config.get('candle_type_def', CandleType.SPOT),
         )
 
diff --git a/freqtrade/freqai/data_drawer.py b/freqtrade/freqai/data_drawer.py
index 5fdb8be25..b9854919d 100644
--- a/freqtrade/freqai/data_drawer.py
+++ b/freqtrade/freqai/data_drawer.py
@@ -635,7 +635,7 @@ class FreqaiDataDrawer:
                     timeframe=tf,
                     pair=pair,
                     timerange=timerange,
-                    data_format=self.config.get("dataformat_ohlcv", "json"),
+                    data_format=self.config.get("dataformat_ohlcv", "feather"),
                     candle_type=self.config.get("candle_type_def", CandleType.SPOT),
                 )
 
diff --git a/freqtrade/freqai/utils.py b/freqtrade/freqai/utils.py
index b670a2aad..bb2c3dd8f 100644
--- a/freqtrade/freqai/utils.py
+++ b/freqtrade/freqai/utils.py
@@ -50,7 +50,7 @@ def download_all_data_for_training(dp: DataProvider, config: Config) -> None:
         timerange=timerange,
         new_pairs_days=new_pairs_days,
         erase=False,
-        data_format=config.get("dataformat_ohlcv", "json"),
+        data_format=config.get("dataformat_ohlcv", "feather"),
         trading_mode=config.get("trading_mode", "spot"),
         prepend=config.get("prepend_data", False),
     )
diff --git a/freqtrade/optimize/backtesting.py b/freqtrade/optimize/backtesting.py
index 4a5536e84..9d10eb328 100644
--- a/freqtrade/optimize/backtesting.py
+++ b/freqtrade/optimize/backtesting.py
@@ -239,7 +239,7 @@ class Backtesting:
             timerange=self.timerange,
             startup_candles=self.config['startup_candle_count'],
             fail_without_data=True,
-            data_format=self.config.get('dataformat_ohlcv', 'json'),
+            data_format=self.config.get('dataformat_ohlcv', 'feather'),
             candle_type=self.config.get('candle_type_def', CandleType.SPOT)
         )
 
@@ -268,7 +268,7 @@ class Backtesting:
                 timerange=self.timerange,
                 startup_candles=0,
                 fail_without_data=True,
-                data_format=self.config.get('dataformat_ohlcv', 'json'),
+                data_format=self.config.get('dataformat_ohlcv', 'feather'),
                 candle_type=self.config.get('candle_type_def', CandleType.SPOT)
             )
         else:
@@ -282,7 +282,7 @@ class Backtesting:
                 timerange=self.timerange,
                 startup_candles=0,
                 fail_without_data=True,
-                data_format=self.config.get('dataformat_ohlcv', 'json'),
+                data_format=self.config.get('dataformat_ohlcv', 'feather'),
                 candle_type=CandleType.FUNDING_RATE
             )
 
@@ -294,7 +294,7 @@ class Backtesting:
                 timerange=self.timerange,
                 startup_candles=0,
                 fail_without_data=True,
-                data_format=self.config.get('dataformat_ohlcv', 'json'),
+                data_format=self.config.get('dataformat_ohlcv', 'feather'),
                 candle_type=CandleType.from_string(self.exchange.get_option("mark_ohlcv_price"))
             )
             # Combine data to avoid combining the data per trade.
diff --git a/freqtrade/plot/plotting.py b/freqtrade/plot/plotting.py
index 7fd20f041..8f939170e 100644
--- a/freqtrade/plot/plotting.py
+++ b/freqtrade/plot/plotting.py
@@ -55,7 +55,7 @@ def init_plotscript(config, markets: List, startup_candles: int = 0):
         timeframe=config['timeframe'],
         timerange=timerange,
         startup_candles=startup_candles,
-        data_format=config.get('dataformat_ohlcv', 'json'),
+        data_format=config.get('dataformat_ohlcv', 'feather'),
         candle_type=config.get('candle_type_def', CandleType.SPOT)
     )
 
diff --git a/freqtrade/rpc/rpc.py b/freqtrade/rpc/rpc.py
index c3759e03a..46ea375cc 100644
--- a/freqtrade/rpc/rpc.py
+++ b/freqtrade/rpc/rpc.py
@@ -1245,7 +1245,7 @@ class RPC:
             pairs=[pair],
             timeframe=timeframe,
             timerange=timerange_parsed,
-            data_format=config.get('dataformat_ohlcv', 'json'),
+            data_format=config.get('dataformat_ohlcv', 'feather'),
             candle_type=config.get('candle_type_def', CandleType.SPOT)
         )
         if pair not in _data:
diff --git a/freqtrade/util/binance_mig.py b/freqtrade/util/binance_mig.py
index 9b0f8521f..024c34dba 100644
--- a/freqtrade/util/binance_mig.py
+++ b/freqtrade/util/binance_mig.py
@@ -64,7 +64,7 @@ def migrate_binance_futures_data(config: Config):
         return
 
     from freqtrade.data.history.idatahandler import get_datahandler
-    dhc = get_datahandler(config['datadir'], config.get('dataformat_ohlcv', 'json'))
+    dhc = get_datahandler(config['datadir'], config.get('dataformat_ohlcv', 'feather'))
 
     paircombs = dhc.ohlcv_get_available_data(
         config['datadir'],