10 Deadly Trading Mistakes! Have You Put Your Account in Danger?

“Unplanned profits always end up turning into bigger losses.” 💥

Have you ever had a winning trade on your account, only to see those profits vanish because of an impulsive decision or poor position management?

90% investors have fallen the traps of these deadly mistakes! In your trading, are you more prone to blindly chasing breakouts, or holding onto losses hoping for a rebound?

Small mistakes like these can accumulate into heavy losses. Today, let’s talk about the 10 most common trading mistakes—how many do you have in your own trading?

Top 10 Most Dangerous Trading Mistakes:

  1. Averaging down without a plan — Buying more to recover losses can actually amplify risk.

  2. Letting small losses turn into disasters — Small losses that are ignored can wipe out your account.

  3. Blindly chasing every breakout — Focusing on price without understanding context or logic.

  4. No stop loss, or moving stops — Losses can snowball uncontrollably.

  5. Frequent trading without reason — Dozens of trades a day can eat into profits via fees and emotional stress.

  6. Overexposing one trade — Putting too many eggs in one basket can be catastrophic.

  7. Thinking you’re smarter than the market — The market is always smarter; arrogance is your enemy.

  8. Measuring success by P&L — Ignoring your system and process, letting short-term swings distort judgment.

  9. Holding on to “it will rebound” hope — Gambling on luck instead of following rules often ends badly.

  10. Poor position sizing — Too big or too small positions put unnecessary stress on your account.

💡 Discussion

Which of these mistakes do you find yourself making most often?

Do you lean more toward strict stop-losses, or waiting for a rebound?

Was there a single trade mistake that taught you a lesson and changed your trading habits?

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# 10 Deadly Trading Mistakes! Have You Put Your Account in Danger?

Disclaimer: Investing carries risk. This is not financial advice. The above content should not be regarded as an offer, recommendation, or solicitation on acquiring or disposing of any financial products, any associated discussions, comments, or posts by author or other users should not be considered as such either. It is solely for general information purpose only, which does not consider your own investment objectives, financial situations or needs. TTM assumes no responsibility or warranty for the accuracy and completeness of the information, investors should do their own research and may seek professional advice before investing.

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  • Shyon
    ·2025-10-02
    TOP
    For me, the biggest mistake is not following my trading plan strictly. I usually start with a clear entry and exit, but when the market moves against me, I give the position “a little more room.” This wider cut-loss tolerance often backfires, turning small losses into much bigger ones.

    Another weakness is controlling my emotions. When losses build up, I sometimes overreact and double down without a solid reason. It feels like trying to “fight back” against the market, but usually just makes things worse.

    Still, every loss has been a teacher. I’ve learned that consistency and discipline matter more than chasing wins or outsmarting the market. My key takeaway is simple: stick to the plan, respect stop-losses, and don’t let emotions dictate trades. Each mistake makes me a bit more cautious and mindful.

    @Tiger_comments @TigerStars

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  • koolgal
    ·2025-10-02
    TOP
    🌟🌟🌟To err is human, to forgive divine.  We have all been guilty of making trading mistakes in the course of our investment journey.

    One of the most common trading mistakes is FOMO-ing into the Hype Train.  "Everyone is buying it!". That's great logic if you are chasing ice cream, but terrible for chasing meme stocks.  By the time you hear the buzz, the smart money has already cashed out and sipping cocktails.

    Another common trading mistake is ignoring risk management.  No stop loss?  That is like skydiving without checking your parachute.  You might feel free, until gravity reminds you of reality.

    Another mistake is falling in love with a stock.  It is not your soul mate, it is just a ticker symbol.  If it is tanking, don't write poetry.  Write an exit strategy.

    I must confess that I have been guilty of making all the above mistakes and much more.  However I view these mistakes not as failures but lessons learnt to be  a better investor.

    @Tiger_comments @TigerStars



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    • koolgalReplying toicycrystal
      Best of luck 🍀🍀🍀
      2025-10-07
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    • koolgalReplying toicycrystal
      May you have a winning week ahead 🌈🌈🌈💰💰💰
      2025-10-07
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    • koolgalReplying toicycrystal
      Appreciate your support 😘😘😘
      2025-10-07
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  • Aqa
    ·2025-10-05
    TOP
    🧨 Many of us had encountered the 10 Deadly Trading Mistakes! Blindly chasing breakouts, Trying to out smart the market, Averaging down without a plan, Letting small losses rolling into disasters, No stop loss, Frequent trading without reason, Overexposed in one stock, Holding on to “sinking ship”, Poor position sizing, Letting short-term swings distort judgement. Hope all my friends Do Due Dilligence before each trade, avoiding the above 10 trading mistakes and win all the way to the moon during this mid-autumn! 🚀🚀🚀🌕 @1PC @SPACE ROCKET @GoodLife99 @icycrystal @Optionspuppy @Tiger_comments
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    • icycrystal
      thanks for sharing
      2025-10-07
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    • 1PC
      [Comfort] ya ... lets eat 🥮 and sucks in our mistakes 😞 this weekend... Thereafter, look forward ⏩😜 and 🪏 the Markets with the New U 😄 for [USD].
      2025-10-05
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  • 1PC
    ·2025-10-05
    TOP

    💥 I’ve made 8 of the 10 deadly trading mistakes: averaging down, ignoring small losses, chasing breakouts, moving stops, overtrading, measuring by P&L, holding on to hope, poor sizing. My $50K → $2K moment was painful—but it taught me discipline. Now I trade with a system: 📈 MA5/12/26, 📊 RSI, 🔊 Volume, 🌀 MACD, 🧭 left-side methods. I’ve reduced those mistakes, review every trade, and follow rules. Growth comes from learning, not luck[Miser]. Trade with intention—not impulse[Happy][Cool]. 🧠📉

    [Miser]@JC888 @Barcode @Shyon @koolgal @Shernice軒嬣 2000 @Aqa @DiAngel

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  • ee244c
    ·2025-10-02
    TOP
    当我带来一只交易清淡的股票时,我经历了一个接近的看涨期权。当价格下跌时我继续购买
    我没有意识到这只股票的保证金只有30%,如果我在审查后没有达到安全保证金水平,老虎就会平仓或抛售以满足保证金。幸运的是,我能够及时削减总持股量,而没有造成损失。
    吸取教训不要过度追逐并监控每只股票的允许水平。
    $城市发展(C09.SI)$
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  • highhand
    ·2025-10-02
    TOP
    if trading a stock with no fundamentals and purely price action, definitely need a stop loss. if trading a fundamentally good stock that don't mind holding long term, and still hold provided you want to own the stock. need to consider opportunity lost too, as other stocks are running up.  to prevent bag holding, always watch your allocation and enter a few support levels
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  • Optionhawk
    ·2025-10-02
    TOP
    A mistake most people will make. Greed. Have a target price to close the position but due to greed, hold longer and in the end, the price reverse and profit became losses.


    Nowadays, have learnt to take profit along the way. Secure profits always better than losses at the end of the day
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  • Cadi Poon
    ·2025-10-02
    TOP
    十大最危險的交易錯誤:

    在沒有計劃的情況下平均下跌——購買更多以彌補損失實際上會放大風險。

    讓小損失變成災難——被忽視的小損失會讓你的賬戶化爲烏有。

    盲目追逐每一次突破——在不瞭解背景或邏輯的情況下關注價格。

    沒有止損,或者移動止損——損失會不受控制地滾雪球。

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  • TheNerdyRuby
    ·2025-10-03
    I always feel like gambling without knowing the reason i buy the stocks. Yes you maybe need a bit of luck, but with good analysis and understanding of how market works and move it will give u greater chance. Im still learning 😏
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  • Sachy
    ·2025-10-02
    Have always had the mindset to trade like a robot. Set initial stop loss, moving stop loss from when first target is hit. Set 3 targets and sell 20% of your holdings when you reach each target. The last 40% allow to run should you reach those first 3 targets and only sell when it hits your moving stop loss (I Set mine at 7% below the highest price of the stock since I've owned it).
    Unfortunately there have been multiple times I've strayed from this strategy and got greedy (human nature) and been burnt.
    So best thing I found is to trade like a robot!!
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  • LiverpoolRed
    ·2025-10-02
    My greatest mistakes are as follow:-
    1. Averaging down without a plan — Buying more to recover losses can actually amplify risk.

    2. Letting small losses turn into disasters — Small losses that are ignored can wipe out your account.

    3. No stop loss, or moving stops — Losses can snowball uncontrollably.

    4. Holding on to “it will rebound” hope — Gambling on luck instead of following rules often ends badly.

    5. Ego as I do not want to sell at loss. I always think I am buying a share for earning profit and not at loss, so I will hold on to it till it make profit before I decided to sell off. As a result, I can end up the share become zero value due to delisting.

    However, all these mistakes still never change my trading habits. I never regretted holding on to the shares like $Alibaba(BABA)$ $Sea Ltd(SE)$ $Palantir Technologies Inc.(PLTR)$ $Tiger Brokers(TIGR)$ $Snowflake(SNOW)$

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  • Subramanyan
    ·2025-10-02
    I can see myself often afflicted by (2) that is sticking to a counter being scared by exiting at a small loss to later see it becoming a mess with much larger losses. Another one of my issues, not listed in the above 10, is not booking timely profits. Many times this has led to the profits reducing ir even vanishing in the future - this has happened at least 3 times after trump took over this year.
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  • Apollos
    ·2025-10-02
    It's a good article. As an amateur trader, I made all the mistakes. Every mistake is a reflection and learning opportunity. Be disciplined and not greedy. Always trade with no leverage to reduce risk exposure.
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  • Tiger_comments
    ·2025-10-16
    Thanks for participating in my discussion. Your coins have been sent through the tiger coin center![Tongue][Tongue]
    Check them in the history - “community distribution“
    @icycrystal
    @WonderElephant
    @icycrystal
    @Success88
    @Isleigh
    @Ybot
    @TheWhiteTigerHorse
    @TheStrategist
    @D45
    @FTGR
    @Regalo Sono
    @ECLC
    @1PC
    @WanEH
    @L.Lim
    @Lemony33
    @TheNerdyRuby
    @Jackosen
    @DesireeTan
    @Optionhawk
    @Cadi Poon
    @embraceit
    @highhand
    @Subramanyan
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    @Sachy
    @1PC
    @Aqa
    @LiverpoolRed
    @Shyon
    @Lanceljx
    @MHh
    @koolgal
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  • L.Lim
    ·2025-10-10
    I go for long term and buy into sensible companies, in hopes that I can let them grow organically.
    So I guess I'm at risk of having losses grow? Too stubborn to sell... maybe I'll be a little more pragmatic
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  • WanEH
    ·2025-10-03
    嘿嘿,我犯了这个错误过度暴露一项交易——把太多鸡蛋放在一个篮子里。操作了两次全仓+杠杆投资在一家公司,第一次成功,第二次飘了结果亏到妈妈认不得孩子。以后就不敢这么弄了。 @Tiramisu2020
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  • Jackosen
    ·2025-10-03
    $PayPal(PYPL)$ is my biggest trading mistakes. Bought it at high around 200+ and DCA at every dip, thinking that it may recover. Now stuck with paper loss. Now I learnt my mistakes and applied stop loss if things go out of plan.
    @TigerEvents
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  • Lanceljx
    ·2025-10-03
    我过去最纠结的是#2(让小损失变成大损失)和#9(希望反弹),尤其是在我相信“它会回来的”的早期。这种心态将可控的损失变成了惨痛的教训。市场最终告诉我,保本是首要任务,保护下行空间才能让你留在游戏中。

    随着时间的推移,我越来越倾向于严格的止损。它们有助于消除情绪,迫使人们承担责任。当交易达到我预定义的限额时,我退出;没有犹豫,没有讨价还价。我还学会了缩小头寸规模,这样止损就不会感到惩罚性。

    一个转折点来自科技股交易,该交易下跌了40%,而我的平均水平一直在下降,相信它会恢复。从来没有。那次损失彻底改变了我的方法;我开始记录交易,在入场前定义风险,并尊重每一次止损。从那以后,我意识到推动长期成功的是一致性和纪律性,而不是预测。

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  • embraceit
    ·2025-10-03
    I hit the jackpot! as I trade, I reflect and try to be better with the mistakes made. I treated those as my tuition fees for trading. I also read on other's winning trading strategies and picked up those that best suit my trading behaviour. I appreciate Tiger for providing me with the platform to learn and trade.
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  • Sarohiwal
    ·2025-10-02
    Very well write-up.


    These are the very common mistakes transfers do.


    Many traders struggle not because of the market, but because of avoidable mistakes. The most common ones are trading without a clear plan, ignoring risk management, overtrading, and letting emotions like fear or greed control decisions. Another mistake is expecting quick profits without patience or continuous learning.


    Success in trading comes from discipline – having a plan, managing risk, staying calm, and always learning from past trades.
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