diff --git a/KLHZ.Trader.Core/DataLayer/TraderDbContext.cs b/KLHZ.Trader.Core/DataLayer/TraderDbContext.cs
index 66222b6..4b8b13b 100644
--- a/KLHZ.Trader.Core/DataLayer/TraderDbContext.cs
+++ b/KLHZ.Trader.Core/DataLayer/TraderDbContext.cs
@@ -10,7 +10,7 @@ namespace KLHZ.Trader.Core.DataLayer
     {
         public DbSet<Declision> Declisions { get; set; }
         public DbSet<Trade> Trades { get; set; }
-        public DbSet<PriceChange> PriceChanges { get; set; }
+        //public DbSet<PriceChange> PriceChanges { get; set; }
         public DbSet<ProcessedPrice> ProcessedPrices { get; set; }
         public DbSet<ExperimentsResult> ExperimentsResults { get; set; }
         public DbSet<OrderbookItem> OrderbookItems { get; set; }
@@ -33,15 +33,15 @@ namespace KLHZ.Trader.Core.DataLayer
                         v => DateTime.SpecifyKind(v, DateTimeKind.Utc));
             });
 
-            modelBuilder.Entity<PriceChange>(entity =>
-            {
-                entity.HasKey(e1 => e1.Id);
-                entity.Ignore(e1 => e1.IsHistoricalData);
-                entity.Property(e => e.Time)
-                    .HasConversion(
-                        v => v.ToUniversalTime(),
-                        v => DateTime.SpecifyKind(v, DateTimeKind.Utc));
-            });
+            //modelBuilder.Entity<PriceChange>(entity =>
+            //{
+            //    entity.HasKey(e1 => e1.Id);
+            //    entity.Ignore(e1 => e1.IsHistoricalData);
+            //    entity.Property(e => e.Time)
+            //        .HasConversion(
+            //            v => v.ToUniversalTime(),
+            //            v => DateTime.SpecifyKind(v, DateTimeKind.Utc));
+            //});
 
             modelBuilder.Entity<Trade>(entity =>
             {
diff --git a/KLHZ.Trader.Core/Exchange/Services/ExchangeDataReader.cs b/KLHZ.Trader.Core/Exchange/Services/ExchangeDataReader.cs
index ee76758..7f6112f 100644
--- a/KLHZ.Trader.Core/Exchange/Services/ExchangeDataReader.cs
+++ b/KLHZ.Trader.Core/Exchange/Services/ExchangeDataReader.cs
@@ -204,7 +204,7 @@ namespace KLHZ.Trader.Core.Exchange.Services
                     try
                     {
                         using var context = await _dbContextFactory.CreateDbContextAsync();
-                        context.ChangeTracker.QueryTrackingBehavior = QueryTrackingBehavior.NoTracking;
+                        //context.ChangeTracker.QueryTrackingBehavior = QueryTrackingBehavior.NoTracking;
                         lastWrite = DateTime.UtcNow;
                         if (orderbookItemsBuffer.Count > 0)
                         {
diff --git a/KLHZ.Trader.Core/Exchange/Services/TraderDataProvider.cs b/KLHZ.Trader.Core/Exchange/Services/TraderDataProvider.cs
index c74fa4c..a4801bb 100644
--- a/KLHZ.Trader.Core/Exchange/Services/TraderDataProvider.cs
+++ b/KLHZ.Trader.Core/Exchange/Services/TraderDataProvider.cs
@@ -130,7 +130,7 @@ namespace KLHZ.Trader.Core.Exchange.Services
                     var time = DateTime.UtcNow.AddHours(-20);
                     using var context1 = await _dbContextFactory.CreateDbContextAsync();
                     context1.ChangeTracker.QueryTrackingBehavior = QueryTrackingBehavior.NoTracking;
-                    var data = await context1.PriceChanges
+                    var data = await context1.Trades
                         .Where(c => _tradingInstrumentsFigis.Contains(c.Figi) && c.Time >= time)
                         .OrderBy(c => c.Time)
                         .Select(c => new TradeDataItem()
diff --git a/KLHZ.Trader.Service/Controllers/PlayController.cs b/KLHZ.Trader.Service/Controllers/PlayController.cs
index da4d7ae..1b33e2e 100644
--- a/KLHZ.Trader.Service/Controllers/PlayController.cs
+++ b/KLHZ.Trader.Service/Controllers/PlayController.cs
@@ -47,7 +47,7 @@ namespace KLHZ.Trader.Service.Controllers
                         .Where(oi => (oi.Figi == figi1 || oi.Figi == figi2) && oi.Time >= time1 && oi.Time < time2)
                         .OrderBy(c => c.Time)
                         .ToArrayAsync();
-                    var prices = await context1.PriceChanges
+                    var prices = await context1.Trades
                         .Where(c => (c.Figi == figi1 || c.Figi == figi2) && c.Time >= time1 && c.Time < time2)
                         .OrderBy(c => c.Time)
                         .Select(c => new TradeDataItem()
@@ -255,7 +255,7 @@ namespace KLHZ.Trader.Service.Controllers
                 context1.ChangeTracker.QueryTrackingBehavior = QueryTrackingBehavior.NoTracking;
 
                 var time1 = time2.AddHours(-3);
-                var prices = await context1.PriceChanges
+                var prices = await context1.Trades
                     .Where(c => (c.Figi == figi1 || c.Figi == figi2) && c.Time >= time1 && c.Time < time2 && c.Direction == 1)
                     .OrderBy(c => c.Time)
                     .Select(c => new TradeDataItem()
@@ -360,7 +360,7 @@ namespace KLHZ.Trader.Service.Controllers
 
                 using var context1 = await _dbContextFactory.CreateDbContextAsync();
                 context1.ChangeTracker.QueryTrackingBehavior = QueryTrackingBehavior.NoTracking;
-                var figis = context1.PriceChanges.Select(p => p.Figi).Distinct().ToArray();
+                var figis = context1.Trades.Select(p => p.Figi).Distinct().ToArray();
 
                 foreach (var f in figis)
                 {
@@ -371,7 +371,7 @@ namespace KLHZ.Trader.Service.Controllers
                         while (time1 < DateTime.UtcNow)
                         {
                             var time2 = time1.AddDays(7);
-                            var prices = await context1.PriceChanges
+                            var prices = await context1.Trades
                                 .Where(c => (c.Figi == f) && c.Time >= time1 && c.Time < time2)
                                 .OrderBy(c => c.Time)
                                 .ToArrayAsync();