diff --git a/KLHZ.Trader.Core/Exchange/Services/Trader.cs b/KLHZ.Trader.Core/Exchange/Services/Trader.cs
index 2c63710..396a0a6 100644
--- a/KLHZ.Trader.Core/Exchange/Services/Trader.cs
+++ b/KLHZ.Trader.Core/Exchange/Services/Trader.cs
@@ -691,7 +691,7 @@ namespace KLHZ.Trader.Core.Exchange.Services
                     if (acc.Value.Assets.TryGetValue(message.Figi, out var asset))
                     {
                         var order = acc.Value.Orders.Values.FirstOrDefault(o => o.Figi == message.Figi && o.Direction == DealDirection.Sell);
-                        if (order == null && asset.Count > 0)
+                        if (order == null && asset.Count > 0 && await asset.Lock(TimeSpan.FromSeconds(60))
                         {
                             var command = new TradeCommand()
                             {
@@ -829,7 +829,7 @@ namespace KLHZ.Trader.Core.Exchange.Services
                     if (acc.Value.Assets.TryGetValue(message.Figi, out var asset))
                     {
                         var order = acc.Value.Orders.Values.FirstOrDefault(o => o.Figi == message.Figi && o.Direction == DealDirection.Buy);
-                        if (order == null && asset.Count < 0)
+                        if (order == null && asset.Count < 0 && await asset.Lock(TimeSpan.FromSeconds(60)))
                         {
                             var command = new TradeCommand()
                             {