diff --git a/cmd/monitor/block.go b/cmd/monitor/block.go
new file mode 100644
index 00000000..d443cee7
--- /dev/null
+++ b/cmd/monitor/block.go
@@ -0,0 +1 @@
+package monitor
diff --git a/cmd/monitor/cmd.go b/cmd/monitor/cmd.go
index 2f57cd04..f1166c5e 100644
--- a/cmd/monitor/cmd.go
+++ b/cmd/monitor/cmd.go
@@ -15,9 +15,10 @@ var (
 	usage string
 
 	// flags
-	rpcUrl         string
-	batchSizeValue string
-	intervalStr    string
+	rpcUrl          string
+	batchSizeValue  string
+	blockCacheLimit int
+	intervalStr     string
 )
 
 // MonitorCmd represents the monitor command
@@ -37,6 +38,7 @@ var MonitorCmd = &cobra.Command{
 func init() {
 	MonitorCmd.PersistentFlags().StringVarP(&rpcUrl, "rpc-url", "r", "http://localhost:8545", "The RPC endpoint url")
 	MonitorCmd.PersistentFlags().StringVarP(&batchSizeValue, "batch-size", "b", "auto", "Number of requests per batch")
+	MonitorCmd.PersistentFlags().IntVarP(&blockCacheLimit, "cache-limit", "c", 50, "Number of cached blocks for the LRU block data structure")
 	MonitorCmd.PersistentFlags().StringVarP(&intervalStr, "interval", "i", "5s", "Amount of time between batch block rpc calls")
 }
 
@@ -66,5 +68,10 @@ func checkFlags() (err error) {
 		}
 	}
 
+	// Check batch-size flag.
+	if blockCacheLimit < 50 {
+		return fmt.Errorf("block-cache can't be less than 50")
+	}
+
 	return nil
 }
diff --git a/cmd/monitor/monitor.go b/cmd/monitor/monitor.go
index 7d793143..1079aff2 100644
--- a/cmd/monitor/monitor.go
+++ b/cmd/monitor/monitor.go
@@ -90,7 +90,7 @@ func monitor(ctx context.Context) error {
 	ec := ethclient.NewClient(rpc)
 
 	ms := new(monitorStatus)
-	ms.BlockCache, _ = lru.New(100)
+	ms.BlockCache, _ = lru.New(blockCacheLimit)
 	ms.MaxBlockRetrieved = big.NewInt(0)
 
 	ms.ChainID = big.NewInt(0)
@@ -193,8 +193,6 @@ func prependLatestBlocks(ctx context.Context, ms *monitorStatus, rpc *ethrpc.Cli
 	}
 }
 
-const maxHistoricalPoints = 100 // set a limit to the number of historical points
-
 func fetchBlocks(ctx context.Context, ec *ethclient.Client, ms *monitorStatus, rpc *ethrpc.Client, isUiRendered bool) (err error) {
 	var cs *chainState
 	cs, err = getChainState(ctx, ec)
@@ -203,10 +201,6 @@ func fetchBlocks(ctx context.Context, ec *ethclient.Client, ms *monitorStatus, r
 		time.Sleep(interval)
 		return err
 	}
-	if len(observedPendingTxs) >= maxHistoricalPoints {
-		// remove the oldest data point
-		observedPendingTxs = observedPendingTxs[1:]
-	}
 	observedPendingTxs = append(observedPendingTxs, historicalDataPoint{SampleTime: time.Now(), SampleValue: float64(cs.PendingCount)})
 
 	log.Debug().Uint64("PeerCount", cs.PeerCount).Uint64("ChainID", cs.ChainID.Uint64()).Uint64("HeadBlock", cs.HeadBlock).Uint64("GasPrice", cs.GasPrice.Uint64()).Msg("Fetching blocks")