diff --git a/blockchain/parity/ethpoller/mode/fork.pm b/blockchain/parity/ethpoller/mode/fork.pm
index 226fdbc4a..7fc4f5c0c 100644
--- a/blockchain/parity/ethpoller/mode/fork.pm
+++ b/blockchain/parity/ethpoller/mode/fork.pm
@@ -24,6 +24,7 @@ use base qw(centreon::plugins::templates::counter);
 
 use strict;
 use warnings;
+use Cache::File;
 use centreon::plugins::templates::catalog_functions qw(catalog_status_threshold catalog_status_calc);
 
 sub new {
diff --git a/blockchain/parity/ethpoller/mode/watchlist.pm b/blockchain/parity/ethpoller/mode/watchlist.pm
index 8a6e734f2..a6a7b28f8 100644
--- a/blockchain/parity/ethpoller/mode/watchlist.pm
+++ b/blockchain/parity/ethpoller/mode/watchlist.pm
@@ -24,6 +24,7 @@ use base qw(centreon::plugins::templates::counter);
 
 use strict;
 use warnings;
+use Cache::File;
 use Digest::MD5 qw(md5_hex);
 
 sub new {
@@ -49,14 +50,6 @@ sub manage_selection {
     # Alerts management 
     my $cache = Cache::File->new( cache_root => './parity-eth-poller-cache' );
 
-    if (my $cached_balance = $cache->get('contract_balance')) {
-        if ($cached_balance != $contract->{balance}) {
-            #alert
-        }
-    } else {
-        $cache->set('contract_balance', $contract->{balance});
-    }
-
     foreach my $account (@{$results->{Accounts}}) {
         if (defined($self->{option_results}->{filter_name}) && $self->{option_results}->{filter_name} ne '' &&
             $account->{id} !~ /$self->{option_results}->{filter_name}/) {
@@ -90,6 +83,15 @@ sub manage_selection {
         $self->{output}->output_add(severity  => 'OK', long_msg => '[Contract ' . $contract->{id} . ']: label: ' . $contract->{label} . ' | balance: ' . $contract->{balance} .
                             ' | timestamp: ' . localtime(hex($contract->{last_update}->{timestamp})) . ' | blockNumber: ' . $contract->{last_update}->{blockNumber} . 
                             ' | sender: ' . $contract->{last_update}->{sender} . ' | value: ' . $contract->{last_update}->{value} );
+
+        if (my $cached_balance = $cache->get('contract_balance_' . $contract->{id})) {
+            if ($cached_balance != $contract->{balance}) {
+                #alert
+            }
+        } else {
+            $cache->set('contract_balance_' . $contract->{id}, $contract->{balance});
+        }
+
     }
 
     foreach my $function (@{$results->{Functions}}) {
diff --git a/blockchain/parity/restapi/mode/eth.pm b/blockchain/parity/restapi/mode/eth.pm
index ca604f753..00c479110 100644
--- a/blockchain/parity/restapi/mode/eth.pm
+++ b/blockchain/parity/restapi/mode/eth.pm
@@ -24,6 +24,7 @@ use base qw(centreon::plugins::templates::counter);
 
 use strict;
 use warnings;
+use Cache::File;
 use centreon::plugins::templates::catalog_functions qw(catalog_status_threshold catalog_status_calc);
 
 sub custom_status_output {
diff --git a/blockchain/parity/restapi/mode/net.pm b/blockchain/parity/restapi/mode/net.pm
index 02ba31028..17ceaed4b 100644
--- a/blockchain/parity/restapi/mode/net.pm
+++ b/blockchain/parity/restapi/mode/net.pm
@@ -24,6 +24,7 @@ use base qw(centreon::plugins::templates::counter);
 
 use strict;
 use warnings;
+use Cache::File;
 use centreon::plugins::templates::catalog_functions qw(catalog_status_threshold catalog_status_calc);
 
 sub custom_status_output {