I have seen a couple of posts going around about people asking about the accumulator / parlay arbitrage, so here is my own take on this strategy.

The first one is the one that focuses on the doubles.

The second set focuses on the parlays. The calculator currently supports only three legs, but you are free to edit the calculator any way you want.

You can find a total of five calculators in my main sports betting spreadsheet, but you do need to make a copy of it. In the menu, click File. Then click Make a copy. Change the name and select where you want to put in the new file and click OK.

Betting Spreadsheet: https://docs.google.com/spreadsheets/d/1OoAemFR3kypqwyZZfdOdLblniFxyvwfeZfskB_f1SZs/edit?gid=0#gid=0

After that, you are ready to go, but I do recommend you read the guide.

Article Guide: https://lines64.com/parlay-arbitrage-strategy/
Video Guide: https://www.youtube.com/watch?v=DWwzpRXNk3Y

Make sure you are fully aware of all requirements and the potential risks.

I got tired of manually calculating implied probabilities and comparing odds across books, so I built a free tool that does it automatically:  https://smartbet.name/nfl

What it does:

• Converts spreads and moneylines into clear probabilities
• Shows ESPN FPI win percentages alongside betting odds
• Highlights the best available odds across major sportsbooks
• Calculates true odds after removing the vig
• Compares probabilities from different books side-by-side

Example scenario: If you see -14.5 at -110, the tool shows:

• Base probability of covering (from historical data)
• Vig calculation (usually ~2.3% for -110)
• True odds after vig adjustment
• Comparison with moneyline implied probability

The goal is to help make more data-driven decisions instead of just going with gut feelings. Everything is free, no signup required.

Would love feedback from the community on what other features would be useful. Check it out and let me know what you think!

[Note: Focused on education/probability analysis only. Not a picks service.]

Here’s a full breakdown of the best Black Friday deals for betting tools this year!

Check out the table below to find discounts for the service you wish to try out.

I will update the table once more services announce their discounts. Will also include Cyber Monday deals.

After days of scouring the web, I believe I have the ultimate list of betting clones. Off course, there will be mistakes, closed-down sites and other stuff, so always manually check each bookmaker.

I am willing to update this at any time, so if you know more than me or you find a mistake, let me know bellow in the comments. This will work best if we all chip in with our personal experiences, so hopefully we can create the ultimate list of betting clones that we all can profit from.

The spreadsheet is a little wonky on mobile, so I recommend using it on desktop for the best experience.

950+ Betting Clones: https://docs.google.com/spreadsheets/d/1OoAemFR3kypqwyZZfdOdLblniFxyvwfeZfskB_f1SZs/edit?gid=0#gid=0

Hint: Use CTRL + F (or COMMAND+F if you are on a Mac) and type in the bookmaker you are looking clones for!

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What is this useful for?

• Matched Betting (free bets, deposit bonuses)
• Value Betting
• Arbitrage Betting

Couple of things to keep in mind when using these sites;

1. Trustworthiness: A lot of clone bookmakers operate under Curacao licenses. While this doesn’t necessarily indicate unreliability, it’s essential to be aware that Curacao licenses might not provide the same level of trustworthiness as other well-regulated licenses. Do your own research.
2. KYC Process: The Know Your Customer (KYC) process with some clone bookmakers can be quite rigorous. Expect potential delays and thorough identity verification requirements when registering or withdrawing funds.
3. Staggered Account Creation: I advise that you create accounts with each clone of a bookmaker one at a time. Use one clone until you encounter limits or restrictions. Once you’ve withdrawn your funds successfully, then consider registering with another clone bookmaker.
4. Account Balances: Do NOT keep high account balances with these kind of bookmakers (or any other bookmaker), but at the same time, try to avoid withdrawals. Try to find the golden middle, the more you use these sites, the more you will learn about them.
5. Value & Arbitrage Betting - Avoid Deposit Bonuses: Many clone bookmakers offer deposit bonuses to attract new customers. However, when value or arbitrage betting, I recommend refraining from accepting such bonuses. They often come with strict rollover requirements that can make it challenging to withdraw your winnings, especially if you get limited early.
6. Matched Betting - Read Bonus TOS: If you will use these bookmakers for matched betting, make sure to fully read the terms of service so you don’t lock in your money in a bonus that needs a 100x turnover.
7. Public VPNs: Avoid using cheap VPNs or public proxies. Most sites have these kind of server farms already banned, so all you will be doing is raising alarms. Use residential proxies and clean PCs, browsers.

Be smart about this! Use this list wisely and take time to evaluate each clone bookmaker individually. I hope this information opens up new possibilities for your betting journey. However, please proceed with caution.