Hi,

I am not using the Framework Execution model but using MarketOrder for buying. When doing live trading with Interactive Brokers, the order is being executed in chunks. 

Is this the default behavior or do I have to set an execution model? Reason I am asking is because splitting the order up seems to increase the commissions fees.

2021-03-30 13:31:19 New Order Event: Time: 03/30/2021 13:31:19 OrderID: 6 EventID: 59 Symbol: VTSI Status: PartiallyFilled Quantity: 17571 FillQuantity: 100 FillPrice: 6.86 USD LimitPrice: 7.47 OrderFee: 0.370257 USD Message: Interactive Brokers Order Fill Event - 8671 remaining 2021-03-30 13:31:19 New Order Event: Time: 03/30/2021 13:31:19 OrderID: 6 EventID: 60 Symbol: VTSI Status: PartiallyFilled Quantity: 17571 FillQuantity: 100 FillPrice: 6.86 USD LimitPrice: 7.47 OrderFee: 0.370257 USD Message: Interactive Brokers Order Fill Event - 8571 remaining 2021-03-30 13:31:19 New Order Event: Time: 03/30/2021 13:31:19 OrderID: 6 EventID: 61 Symbol: VTSI Status: PartiallyFilled Quantity: 17571 FillQuantity: 100 FillPrice: 6.85 USD LimitPrice: 7.47 OrderFee: 0.670257 USD Message: Interactive Brokers Order Fill Event - 8471 remaining 2021-03-30 13:31:22 New Order Event: Time: 03/30/2021 13:31:22 OrderID: 6 EventID: 62 Symbol: VTSI Status: PartiallyFilled Quantity: 17571 FillQuantity: 100 FillPrice: 6.8 USD LimitPrice: 7.47 OrderFee: 0.670257 USD Message: Interactive Brokers Order Fill Event - 8371 remaining 2021-03-30 13:31:22 New Order Event: Time: 03/30/2021 13:31:22 OrderID: 6 EventID: 63 Symbol: VTSI Status: PartiallyFilled Quantity: 17571 FillQuantity: 100 FillPrice: 6.8 USD LimitPrice: 7.47 OrderFee: 0.670257 USD Message: Interactive Brokers Order Fill Event - 8271 remaining 2021-03-30 13:31:22 New Order Event: Time: 03/30/2021 13:31:22 OrderID: 6 EventID: 64 Symbol: VTSI Status: PartiallyFilled Quantity: 17571 FillQuantity: 100 FillPrice: 6.81 USD LimitPrice: 7.47 OrderFee: 0.440257 USD Message: Interactive Brokers Order Fill Event - 8171 remaining 2021-03-30 13:31:25 New Order Event: Time: 03/30/2021 13:31:25 OrderID: 6 EventID: 65 Symbol: VTSI Status: PartiallyFilled Quantity: 17571 FillQuantity: 300 FillPrice: 6.9 USD LimitPrice: 7.47 OrderFee: 2.010772 USD Message: Interactive Brokers Order Fill Event - 7871 remaining 2021-03-30 13:31:28 New Order Event: Time: 03/30/2021 13:31:28 OrderID: 6 EventID: 66 Symbol: VTSI Status: PartiallyFilled Quantity: 17571 FillQuantity: 300 FillPrice: 6.89 USD LimitPrice: 7.47 OrderFee: 1.950772 USD Message: Interactive Brokers Order Fill Event - 7571 remaining 2021-03-30 13:31:31 New Order Event: Time: 03/30/2021 13:31:31 OrderID: 6 EventID: 67 Symbol: VTSI Status: PartiallyFilled Quantity: 17571 FillQuantity: 100 FillPrice: 6.96 USD LimitPrice: 7.47 OrderFee: 0.630257 USD Message: Interactive Brokers Order Fill Event - 7471 remaining 2021-03-30 13:31:31 New Order Event: Time: 03/30/2021 13:31:31 OrderID: 6 EventID: 68 Symbol: VTSI Status: PartiallyFilled Quantity: 17571 FillQuantity: 100 FillPrice: 6.96 USD LimitPrice: 7.47 OrderFee: 0.670257 USD Message: Interactive Brokers Order Fill Event - 7371 remaining 2021-03-30 13:31:31 New Order Event: Time: 03/30/2021 13:31:31 OrderID: 6 EventID: 69 Symbol: VTSI Status: PartiallyFilled Quantity: 17571 FillQuantity: 100 FillPrice: 6.96 USD LimitPrice: 7.47 OrderFee: 0.370257 USD Message: Interactive Brokers Order Fill Event - 7271 remaining 2021-03-30 13:31:31 New Order Event: Time: 03/30/2021 13:31:31 OrderID: 6 EventID: 70 Symbol: VTSI Status: PartiallyFilled Quantity: 17571 FillQuantity: 100 FillPrice: 6.96 USD LimitPrice: 7.47 OrderFee: 0.370257 USD Message: Interactive Brokers Order Fill Event - 7171 remaining 2021-03-30 13:31:34 New Order Event: Time: 03/30/2021 13:31:34 OrderID: 6 EventID: 71 Symbol: VTSI Status: PartiallyFilled Quantity: 17571 FillQuantity: 300 FillPrice: 6.96 USD LimitPrice: 7.47 OrderFee: 0.570772 USD Message: Interactive Brokers Order Fill Event - 6871 remaining 2021-03-30 13:31:37 New Order Event: Time: 03/30/2021 13:31:37 OrderID: 6 EventID: 72 Symbol: VTSI Status: PartiallyFilled Quantity: 17571 FillQuantity: 400 FillPrice: 6.96 USD LimitPrice: 7.47 OrderFee: 0.761029 USD Message: Interactive Brokers Order Fill Event - 6471 remaining 2021-03-30 13:31:40 New Order Event: Time: 03/30/2021 13:31:40 OrderID: 6 EventID: 73 Symbol: VTSI Status: PartiallyFilled Quantity: 17571 FillQuantity: 300 FillPrice: 6.9 USD LimitPrice: 7.47 OrderFee: 2.010772 USD Message: Interactive Brokers Order Fill Event - 6171 remaining 2021-03-30 13:31:43 New Order Event: Time: 03/30/2021 13:31:43 OrderID: 6 EventID: 74 Symbol: VTSI Status: PartiallyFilled Quantity: 17571 FillQuantity: 300 FillPrice: 6.88 USD LimitPrice: 7.47 OrderFee: 1.950772 USD Message: Interactive Brokers Order Fill Event - 5871 remaining 2021-03-30 13:31:46 New Order Event: Time: 03/30/2021 13:31:46 OrderID: 6 EventID: 75 Symbol: VTSI Status: PartiallyFilled Quantity: 17571 FillQuantity: 100 FillPrice: 6.86 USD LimitPrice: 7.47 OrderFee: 0.370257 USD Message: Interactive Brokers Order Fill Event - 5771 remaining 2021-03-30 13:31:46 New Order Event: Time: 03/30/2021 13:31:46 OrderID: 6 EventID: 76 Symbol: VTSI Status: PartiallyFilled Quantity: 17571 FillQuantity: 200 FillPrice: 6.86 USD LimitPrice: 7.47 OrderFee: 1.300514 USD Message: Interactive Brokers Order Fill Event - 5571 remaining 2021-03-30 13:31:49 New Order Event: Time: 03/30/2021 13:31:49 OrderID: 6 EventID: 77 Symbol: VTSI Status: PartiallyFilled Quantity: 17571 FillQuantity: 300 FillPrice: 6.88 USD LimitPrice: 7.47 OrderFee: 1.950772 USD Message: Interactive Brokers Order Fill Event - 5271 remaining 2021-03-30 13:31:52 New Order Event: Time: 03/30/2021 13:31:52 OrderID: 6 EventID: 78 Symbol: VTSI Status: PartiallyFilled Quantity: 17571 FillQuantity: 100 FillPrice: 6.88 USD LimitPrice: 7.47 OrderFee: 0.670257 USD Message: Interactive Brokers Order Fill Event - 5171 remaining 2021-03-30 13:31:52 New Order Event: Time: 03/30/2021 13:31:52 OrderID: 6 EventID: 79 Symbol: VTSI Status: PartiallyFilled Quantity: 17571 FillQuantity: 200 FillPrice: 6.9 USD LimitPrice: 7.47 OrderFee: 0.380514 USD Message: Interactive Brokers Order Fill Event - 4971 remaining 2021-03-30 13:31:55 New Order Event: Time: 03/30/2021 13:31:55 OrderID: 6 EventID: 80 Symbol: VTSI Status: PartiallyFilled Quantity: 17571 FillQuantity: 100 FillPrice: 6.95 USD LimitPrice: 7.47 OrderFee: 0.670257 USD Message: Interactive Brokers Order Fill Event - 4871 remaining