diff --git a/CHANGELOG b/CHANGELOG
index 8dcdf1f..53ff99f 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,7 @@
+- 0.3.1
+	* Add data filter
+- 0.3.0
+	* Reimplement on shep/chainsyncer 0.3.0
 - 0.2.1
 	* Implement --keep-alive flag
 - 0.2.0
diff --git a/eth_monitor/filters/out.py b/eth_monitor/filters/out.py
index d927771..a542ae4 100644
--- a/eth_monitor/filters/out.py
+++ b/eth_monitor/filters/out.py
@@ -1,6 +1,12 @@
 # standard imports
 import sys
 import logging
+import datetime
+
+# external imports
+from hexathon import (
+        strip_0x,
+        )
 
 # local imports
 from .base import RuledFilter
@@ -61,7 +67,18 @@ class OutFilter(RuledFilter):
                 data = data[:8] + '...'
             if len(data) > 0:
                 data = 'data {}'.format(data)
-            s = '{} {} {} {}'.format(self.c, block, tx, data)
+            #s = '{} {} {} {}'.format(self.c, block, tx, data)
+            tx_count = len(block.txs)
+            s = '{} {} block {} {} tx {}/{} {} {}'.format(
+                    self.c,
+                    datetime.datetime.fromtimestamp(block.timestamp),
+                    block.number,
+                    strip_0x(block.hash),
+                    tx.index,
+                    tx_count,
+                    strip_0x(tx.hash),
+                    data,
+                    )
 
         self.w.write(s + '\n')
         self.c += 1
diff --git a/eth_monitor/rules.py b/eth_monitor/rules.py
index 92db54d..436a245 100644
--- a/eth_monitor/rules.py
+++ b/eth_monitor/rules.py
@@ -8,6 +8,36 @@ from chainlib.eth.address import is_same_address
 logg = logging.getLogger()
 
 
+class RuleMethod:
+
+    def __init__(self, methods, description=None):
+        self.methods = methods
+        self.description = description
+        if self.description == None:
+            self.description = str(uuid.uuid4())
+
+
+    def check(self, sender, recipient, data, tx_hash):
+        if len(self.methods) == 0:
+            return False
+
+        for method in self.methods:
+            l = len(method)
+            if len(method) > len(data):
+                continue
+            if data[:l] == method:
+                logg.debug('tx {} rule {} match in DATA {}'.format(tx_hash, self.description, method))
+                return True
+        
+        return False
+
+
+    def __str__(self):
+        return 'Method ' + self.description + ' {}'.format(
+                self.methods,
+                )
+
+
 class RuleSimple:
 
     def __init__(self, outputs, inputs, executables, description=None):
@@ -19,18 +49,18 @@ class RuleSimple:
         self.executables = executables
 
 
-    def check(self, sender, recipient, tx_hash):
+    def check(self, sender, recipient, data, tx_hash):
         for rule in self.outputs:
             if rule != None and is_same_address(sender, rule):
-                logg.debug('tx {} rule INCLUDE match in SENDER {}'.format(tx_hash, sender))
+                logg.debug('tx {} rule {} match in SENDER {}'.format(tx_hash, self.description, sender))
                 return True
         for rule in self.inputs:
             if rule != None and is_same_address(recipient, rule):
-                logg.debug('tx {} rule INCLUDE match in RECIPIENT {}'.format(tx_hash, recipient))
+                logg.debug('tx {} rule {} match in RECIPIENT {}'.format(tx_hash, self.description, recipient))
                 return True
         for rule in self.executables:
             if rule != None and is_same_address(recipient, rule):
-                logg.debug('tx {} rule INCLUDE match in ExECUTABLE {}'.format(tx_hash, recipient))
+                logg.debug('tx {} rule {} match in EXECUTABLE {}'.format(tx_hash, self.description, recipient))
                 return True
 
 
@@ -57,24 +87,25 @@ class AddressRules:
     
     def include(self, rule):
         self.includes.append(rule)
-        logg.info('cache filter added EXCLUDE rule {}'.format(rule))
+        logg.info('cache filter added INCLUDE rule {}'.format(rule))
 
 
     def apply_rules(self, tx):
-        return self.apply_rules_addresses(tx.outputs[0], tx.inputs[0], tx.hash)
+        return self.apply_rules_addresses(tx.outputs[0], tx.inputs[0], tx.payload, tx.hash)
 
 
-    def apply_rules_addresses(self, sender, recipient, tx_hash):
+    # TODO: rename
+    def apply_rules_addresses(self, sender, recipient, data, tx_hash):
         v = self.include_by_default
 
         for rule in self.includes:
-            if rule.check(sender, recipient, tx_hash):
+            if rule.check(sender, recipient, data, tx_hash):
                 v = True
                 logg.info('match in includes rule: {}'.format(rule))
                 break
 
         for rule in self.excludes:
-            if rule.check(sender, recipient, tx_hash):
+            if rule.check(sender, recipient, data, tx_hash):
                 v = False
                 logg.info('match in excludes rule: {}'.format(rule))
                 break
diff --git a/eth_monitor/runnable/sync.py b/eth_monitor/runnable/sync.py
index 2c55d63..96cbc2c 100644
--- a/eth_monitor/runnable/sync.py
+++ b/eth_monitor/runnable/sync.py
@@ -30,6 +30,7 @@ from eth_monitor.filters.cache import Filter as CacheFilter
 from eth_monitor.rules import (
         AddressRules,
         RuleSimple,
+        RuleMethod,
         )
 from eth_monitor.filters import RuledFilter
 from eth_monitor.filters.out import OutFilter
@@ -61,6 +62,8 @@ argparser.add_argument('--keep-alive', action='store_true', dest='keep_alive', h
 argparser.add_argument('--input', default=[], action='append', type=str, help='Add input (recipient) addresses to includes list')
 argparser.add_argument('--output', default=[], action='append', type=str, help='Add output (sender) addresses to includes list')
 argparser.add_argument('--exec', default=[], action='append', type=str, help='Add exec (contract) addresses to includes list')
+argparser.add_argument('--data', default=[], action='append', type=str, help='Add data strings to include list')
+argparser.add_argument('--x-data', default=[], action='append', dest='xdata', type=str, help='Add data strings to exclude list')
 argparser.add_argument('--address', default=[], action='append', type=str, help='Add addresses as input, output and exec to includes list')
 argparser.add_argument('--x-input', default=[], action='append', type=str, dest='xinput', help='Add input (recipient) addresses to excludes list')
 argparser.add_argument('--x-output', default=[], action='append', type=str, dest='xoutput', help='Add output (sender) addresses to excludes list')
@@ -155,10 +158,23 @@ def setup_address_arg_rules(rules, args):
         exclude_outputs.append(address)
         exclude_exec.append(address)
 
-    includes = RuleSimple(include_outputs, include_inputs, include_exec)
+    includes = RuleSimple(include_outputs, include_inputs, include_exec, description='INCLUDE')
     rules.include(includes)
 
-    excludes = RuleSimple(exclude_outputs, exclude_inputs, exclude_exec)
+    excludes = RuleSimple(exclude_outputs, exclude_inputs, exclude_exec, description='EXCLUDE')
+    rules.exclude(excludes)
+
+    return rules
+
+
+def setup_data_arg_rules(rules, args):
+    include_data = args.data
+    exclude_data = args.xdata
+
+    includes = RuleMethod(include_data, description='INCLUDE')
+    rules.include(includes)
+   
+    excludes = RuleMethod(exclude_data, description='EXCLUDE')
     rules.exclude(excludes)
 
     return rules
@@ -301,6 +317,10 @@ def main():
             block_limit = block_offset
 
     address_rules = AddressRules(include_by_default=args.include_default)
+    address_rules = setup_data_arg_rules(
+            address_rules,
+            args,
+            )
     address_rules = setup_address_file_rules(
             address_rules,
             includes_file=args.includes_file,
diff --git a/setup.cfg b/setup.cfg
index 97cb56f..e1dbe6d 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,6 @@
 [metadata]
 name = eth-monitor
-version = 0.3.0
+version = 0.3.1
 description = Monitor and cache transactions using match filters
 author = Louis Holbrook
 author_email = dev@holbrook.no