Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
STONE MARC J
   2. Issuer Name and Ticker or Trading Symbol
TRADESTATION GROUP INC [TRAD] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
VP Corp Dev, Gen Counsel & Sec
(Last)
(First)
(Middle)
8050 SW 10TH STREET, SUITE 4000		 3. Date of Earliest Transaction (Month/Day/Year)
08/08/2005
(Street)

PLANTATION, FL 33324		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)		 4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		 5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)		 6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		 7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 08/08/2005   M   118 A $ 6.63 118 D  
Common Stock 08/08/2005   S   118 D $ 9.61 0 D  
Common Stock 08/10/2005   M   756 A $ 6.63 756 D  
Common Stock 08/10/2005   S   756 D $ 9.4 0 D  

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)		 5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)		 6. Date Exercisable and Expiration Date
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(Instr. 3 and 4)		 8. Price of Derivative Security
(Instr. 5)		 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)		 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Stock Option (Right to buy) $ 6.63 08/08/2005   M     118 01/16/2001(1) 01/16/2010 Common Stock 118 $ 6.63 38,203 D  
Stock Option (Right to buy) $ 6.63 08/10/2005   M     756 01/16/2001(1) 01/16/2010 Common Stock 756 $ 6.63 37,447 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
STONE MARC J
8050 SW 10TH STREET
SUITE 4000
PLANTATION, FL 33324		       VP Corp Dev, Gen Counsel & Sec  

Signatures

 /s/ Marc J. Stone   08/10/2005
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) The derivative securities exercised (874 in total: 118 on August 8, 2005, and 756 on August 10, 2005) became exercisable on January 16, 2001. The remaining derivative securities beneficially owned after such exercises (37,447 in total) became exercisable as follows: 5,447 on January 16, 2001 and 8,000 each on January 16, 2002, 2003, 2004 and 2005.

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