diff --git a/consensus/metrics.go b/consensus/metrics.go
index b4bb7f652..e315fd1f7 100644
--- a/consensus/metrics.go
+++ b/consensus/metrics.go
@@ -26,6 +26,10 @@ type Metrics struct {
 	Rounds metrics.Gauge
 
 	// ValidatorOrVoter: voter
+	// Number of validators
+	Validators metrics.Gauge
+	// Total power of all validators.
+	ValidatorsPower metrics.Gauge
 	// Number of voters.
 	Voters metrics.Gauge
 	// Total power of all voters.
@@ -83,6 +87,18 @@ func PrometheusMetrics(namespace string, labelsAndValues ...string) *Metrics {
 			Help:      "Number of rounds.",
 		}, labels).With(labelsAndValues...),
 
+		Validators: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
+			Namespace: namespace,
+			Subsystem: MetricsSubsystem,
+			Name:      "validators",
+			Help:      "Number of validators.",
+		}, labels).With(labelsAndValues...),
+		ValidatorsPower: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
+			Namespace: namespace,
+			Subsystem: MetricsSubsystem,
+			Name:      "validators_power",
+			Help:      "Total power of all validators.",
+		}, labels).With(labelsAndValues...),
 		Voters: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
 			Namespace: namespace,
 			Subsystem: MetricsSubsystem,
@@ -193,6 +209,8 @@ func NopMetrics() *Metrics {
 
 		Rounds: discard.NewGauge(),
 
+		Validators:           discard.NewGauge(),
+		ValidatorsPower:      discard.NewGauge(),
 		Voters:               discard.NewGauge(),
 		VotersPower:          discard.NewGauge(),
 		VoterPower:           discard.NewGauge(),
diff --git a/consensus/state.go b/consensus/state.go
index 02d09db01..bb049d2b5 100644
--- a/consensus/state.go
+++ b/consensus/state.go
@@ -1521,6 +1521,8 @@ func (cs *State) pruneBlocks(retainHeight int64) (uint64, error) {
 }
 
 func (cs *State) recordMetrics(height int64, block *types.Block) {
+	cs.metrics.Validators.Set(float64(cs.Validators.Size()))
+	cs.metrics.ValidatorsPower.Set(float64(cs.Validators.TotalStakingPower()))
 	cs.metrics.Voters.Set(float64(cs.Voters.Size()))
 	cs.metrics.VotersPower.Set(float64(cs.Voters.TotalVotingPower()))
 
diff --git a/scripts/add_validator.sh b/scripts/add_validator.sh
new file mode 100755
index 000000000..68d330d71
--- /dev/null
+++ b/scripts/add_validator.sh
@@ -0,0 +1,85 @@
+#!/bin/sh
+# This script generate new validator and add new validator to the chain
+# warning:
+#   1. if you input p2p port, abci, api and promethus port is set automatelly
+#   2. if you set multi validator in one device, the `allow_duplicate_ip` of all validator's config should be true.
+#
+# Process
+# 1. generate new validator with keys
+# 2. get genesis.json from persistent_seed
+# 3. change config.toml
+#   - set port
+#	- open prometheus port
+#	- allow duplicate ip to perform multi in node same device.
+# 4. send tx whitch add new validator
+# 5. start new validator
+
+if [ "$#" -ne 3 ]; then
+	echo "generate new validator script"
+	echo ""
+	echo "usage: $0 [path] [p2p port] [persistent_peer]"
+	echo ""
+	echo "Example"
+	echo "$0 ./single1 26677 c8029828535291adbd1782e8aad41c121019e163@localhost:26656"
+	exit 2
+fi
+
+TENDERMINT="./build/tendermint"
+# HOME_PATH="./single3"
+HOME_PATH=$1
+# P2P_PORT=26677
+P2P_PORT=$2
+# PERSISTENT_PEERS='c8029828535291adbd1782e8aad41c121019e163@localhost:26656'
+PERSISTENT_PEERS=$3
+
+ORIGIN_URL=$(echo $PERSISTENT_PEERS | cut -d '@' -f 2 | cut -d ':' -f 1 )":26657"
+ABCI_PORT=$(( $P2P_PORT + 1 ))
+API_PORT=$(( $P2P_PORT + 2 ))
+PROMETHEUS_PORT=$(( $P2P_PORT + 3))
+
+# generate new node with private key
+${TENDERMINT} init --home=${HOME_PATH}
+# show node id
+echo "show node id: "
+$TENDERMINT show_node_id --home=${HOME_PATH}
+
+# cat $HOME_PATH/config/genesis.json
+# get genesis and save genesis file
+curl -s "$ORIGIN_URL/genesis" | jq ".result.genesis" > $HOME_PATH/config/genesis.json
+
+# =======================
+# change config ports
+# proxy(abci)
+# proxy_app = "tcp://127.0.0.1:26658"
+# [rpc] - api
+# laddr = "tcp://127.0.0.1:26657"
+# [p2p]
+# laddr = "tcp://0.0.0.0:26656"
+# allow_duplicate_ip = true
+# [instrumentation]
+# prometheus = false
+# prometheus_listen_addr = ":26660"
+# add persistent_peers
+# persistent_peers = "ID@localhost:26656"
+sed -i'.back' -e "s/26658/$ABCI_PORT/" \
+			  -e "s/26657/${API_PORT}/" \
+			  -e "s/26656/${P2P_PORT}/" \
+			  -e "/prometheus = false/s/false/true/" \
+			  -e "/allow_duplicate_ip = false/s/false/true/" \
+			  -e "/addr_book_strict = true/s/true/false/" \
+			  -e "s/26660/${PROMETHEUS_PORT}/" \
+			  $HOME_PATH/config/config.toml
+
+sed -i'.back' -e "s/persistent_peers = \"\"/persistent_peers = \"${PERSISTENT_PEERS}\"/" \
+        $HOME_PATH/config/config.toml
+
+# show transaction for adding new validator
+# get public key
+echo "Get public address of new validator node"
+PUBLIC_KEY=$(sudo bash -c "cat ${HOME_PATH}/config/priv_validator_key.json" | jq -r ".pub_key.value")
+
+# send tx whitch add new validator
+curl -G --data-urlencode 'tx="val:'${PUBLIC_KEY}'!10"' http://localhost:26657/broadcast_tx_sync
+
+# run new validator
+$TENDERMINT node --proxy_app=persistent_kvstore --home=$HOME_PATH