diff --git a/libs/questdb-client/src/influx-writer.ts b/libs/questdb-client/src/influx-writer.ts
index fe66a5f..62b0a71 100644
--- a/libs/questdb-client/src/influx-writer.ts
+++ b/libs/questdb-client/src/influx-writer.ts
@@ -1,5 +1,5 @@
 import { getLogger } from '@stock-bot/logger';
-import type { BaseTimeSeriesData, InfluxLineData, InfluxWriteOptions } from './types';
+import type { InfluxLineData, InfluxWriteOptions } from './types';
 
 // Interface to avoid circular dependency
 interface QuestDBClientInterface {
@@ -185,11 +185,11 @@ export class QuestDBInfluxWriter {
     };
 
     if (execution.orderId) {
-      tags.order_id = execution.orderId;
+      tags['order_id'] = execution.orderId;
     }
 
     if (execution.strategy) {
-      tags.strategy = execution.strategy;
+      tags['strategy'] = execution.strategy;
     }
 
     await this.writePoint(
@@ -224,7 +224,7 @@ export class QuestDBInfluxWriter {
     };
 
     if (metrics.errorCode) {
-      tags.error_code = metrics.errorCode;
+      tags['error_code'] = metrics.errorCode;
     }
 
     await this.writePoint(
diff --git a/libs/questdb-client/src/query-builder.ts b/libs/questdb-client/src/query-builder.ts
index 7d8e368..2dc1a19 100644
--- a/libs/questdb-client/src/query-builder.ts
+++ b/libs/questdb-client/src/query-builder.ts
@@ -1,10 +1,8 @@
 import { getLogger } from '@stock-bot/logger';
 import type {
-  AggregationQuery,
   QueryResult,
   TableNames,
   TimeRange,
-  TimeSeriesQuery,
 } from './types';
 
 // Interface to avoid circular dependency
diff --git a/libs/questdb-client/src/schema.ts b/libs/questdb-client/src/schema.ts
index a873e12..b5e3c77 100644
--- a/libs/questdb-client/src/schema.ts
+++ b/libs/questdb-client/src/schema.ts
@@ -1,5 +1,5 @@
 import { getLogger } from '@stock-bot/logger';
-import type { IndexDefinition, QueryResult, TableNames, TableSchema } from './types';
+import type { QueryResult, TableSchema } from './types';
 
 // Interface to avoid circular dependency
 interface QuestDBClientInterface {
@@ -299,7 +299,7 @@ export class QuestDBSchemaManager {
   /**
    * Create table partitions for future dates
    */
-  public async createPartitions(tableName: string, days: number = 30): Promise<void> {
+  public async createPartitions(tableName: string, _days: number = 30): Promise<void> {
     // QuestDB handles partitioning automatically based on the PARTITION BY clause
     // This method is for future extensibility
     this.logger.info(`Partitioning is automatic for table ${tableName}`);
@@ -337,16 +337,6 @@ export class QuestDBSchemaManager {
     return sql;
   }
 
-  /**
-   * Build index creation SQL (for future use)
-   */
-  private buildCreateIndexSQL(tableName: string, index: IndexDefinition): string {
-    const indexName = `idx_${tableName}_${index.columns.join('_')}`;
-    const columns = index.columns.join(', ');
-
-    // QuestDB uses different index syntax, this is for future compatibility
-    return `CREATE INDEX ${indexName} ON ${tableName} (${columns})`;
-  }
 
   /**
    * Validate schema definition