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<title>TradingPrimer</title>
<link>https://crypto.simi.vn/</link>
<description>Trading, explained from zero — risk-first crypto trading education.</description>
<language>en</language>
<item><title>Daily Brief — September 28, 2026: The bid arrived Monday and faded all week</title><link>https://crypto.simi.vn/market/2026-09-28-daily-brief</link><guid isPermaLink="true">https://crypto.simi.vn/market/2026-09-28-daily-brief</guid><pubDate>Mon, 28 Sep 2026 00:30:00 GMT</pubDate><description>Bitcoin near $84,425, up 0.03% in 24 hours, with Ether at $2,686.59 and Solana at $121.91. US spot Bitcoin ETFs took $2.4 billion in the week to 25 September &#8212; their strongest since October 2025 &#8212; but daily inflows decayed from $999 million on Monday to $134.5 million on Friday, while the Binance perpetual book fell 14.8% from its Monday peak and funding never once reached its resting rate.</description></item>
<item><title>What is a DEX? The one difference that changes who can freeze, lose or return your money</title><link>https://crypto.simi.vn/what-is/dex</link><guid isPermaLink="true">https://crypto.simi.vn/what-is/dex</guid><pubDate>Sun, 27 Sep 2026 12:30:00 GMT</pubDate><description>A DEX never holds your coins. That one fact decides who can freeze, lose or return your money &#8212; and the honest version has two exceptions: Circle&#8217;s USDC terms reserve the right to block an on-chain address, and on Hyperliquid the validators sign and send every withdrawal. A swap pool and a perp venue charge in different shapes; their fee lines cross at about a $196 ticket. Official docs, read 27 Sep 2026.</description></item>
<item><title>Position correlation, explained: why three 2% trades are not three 2% risks</title><link>https://crypto.simi.vn/what-is/position-correlation</link><guid isPermaLink="true">https://crypto.simi.vn/what-is/position-correlation</guid><pubDate>Fri, 25 Sep 2026 09:40:00 GMT</pubDate><description>Three positions risking 2% each, on a system winning 50% at 1.2:1, simulated 200,000 times: independent, they hit a 50% drawdown 2.5% of the time; at 0.8 correlation, 35.6% &#8212; the risk of a single trade at 4.8%. Sized as one 2% cluster (0.67% each) it fell to 0.02%. Five correlated 2% positions: 84.2%.</description></item>
<item><title>Daily Brief &#8212; September 25, 2026: The book shrank, the price barely moved</title><link>https://crypto.simi.vn/market/2026-09-25-daily-brief</link><guid isPermaLink="true">https://crypto.simi.vn/market/2026-09-25-daily-brief</guid><pubDate>Fri, 25 Sep 2026 00:40:00 GMT</pubDate><description>Bitcoin near $84,391, down 0.08% in 24 hours, with Ether at $2,690.73 and Solana at $116.80. Binance Bitcoin perpetual open interest fell 12.9% &#8212; 14,198 contracts &#8212; across 68 hours in which price fell 1.1%, and funding printed below its 0.0100% resting rate in ten of the last twelve settlements. 25 Sep 2026 brief.</description></item>
<item><title>Which crypto exchanges work in your country, and the three things available can mean</title><link>https://crypto.simi.vn/exchanges/availability-by-country</link><guid isPermaLink="true">https://crypto.simi.vn/exchanges/availability-by-country</guid><pubDate>Thu, 24 Sep 2026 13:00:00 GMT</pubDate><description>Binance, Bybit, OKX and Kraken checked across 12 countries on three layers: account, local currency and derivatives. Only 22 of 48 venue-country pairs clear all three. All three offshore venues exclude Canada, yet 88 Canadian-dollar adverts sat on their P2P boards.</description></item>
<item><title>Self-Custody Checklist Before Your First DEX Trade</title><link>https://crypto.simi.vn/dex/self-custody-checklist-before-first-dex-trade</link><guid isPermaLink="true">https://crypto.simi.vn/dex/self-custody-checklist-before-first-dex-trade</guid><pubDate>Thu, 24 Sep 2026 11:00:00 GMT</pubDate><description>On Hyperliquid, 4 of the 5 wallet prompts that can cost you money are gas-free signatures. What each one authorises, how to size a trading wallet, and why a $20 test beats the 5 USDC minimum.</description></item>
<item><title>The Kelly criterion, explained: why the fastest-growing bet size ruins most traders</title><link>https://crypto.simi.vn/what-is/kelly-criterion</link><guid isPermaLink="true">https://crypto.simi.vn/what-is/kelly-criterion</guid><pubDate>Wed, 23 Sep 2026 10:40:00 GMT</pubDate><description>For a system winning 50% at 1.2:1, full Kelly is 8.3% per trade and hit a 50% drawdown in 89.5% of 200,000 simulated runs; half Kelly kept 75% of the growth at 22.8%. Three points of error in your win rate and full Kelly shrinks the median account to 0.77x on a profitable system.</description></item><item><title>Lowest-Fee Crypto Exchange: Why the Answer Changes</title><link>https://crypto.simi.vn/exchanges/lowest-fee-crypto-exchange</link><guid isPermaLink="true">https://crypto.simi.vn/exchanges/lowest-fee-crypto-exchange</guid><pubDate>Mon, 21 Sep 2026 12:40:00 GMT</pubDate><description>A flat withdrawal fee and a percentage trading fee cross over at about $1,500: below that the withdrawal is 88% of the bill, above it 7%. The same $200 cost $5.70 the default way (card, market order, Tron) and $0.24 the informed way on the same exchange on the same day &#8212; and the 0.10% rate every comparison quotes was 3.5% of the total. Across the ten USDT networks Binance and OKX both publish, OKX is cheaper on seven and Binance on two, with a 1,600-fold gap on Plasma. Bybit publishes no withdrawal fee before you open an account. Official fee pages, read 21 Sep 2026.</description></item>
<item><title>Risk of ruin, explained: why 1% and 3% per trade are not a small difference</title><link>https://crypto.simi.vn/what-is/risk-of-ruin</link><guid isPermaLink="true">https://crypto.simi.vn/what-is/risk-of-ruin</guid><pubDate>Mon, 21 Sep 2026 09:15:00 GMT</pubDate><description>One break-even system simulated 500,000 times: risking 1% per trade gave a 0.008% chance of losing half the account over 200 trades; risking 3% gave 40.4%. Why counting losing streaks understates ruin by roughly 86,000 times, and where the maths is still too optimistic.</description></item><item><title>Daily Brief &#8212; September 21, 2026: The flat close that travelled 3.5%</title><link>https://crypto.simi.vn/market/2026-09-21-daily-brief</link><guid isPermaLink="true">https://crypto.simi.vn/market/2026-09-21-daily-brief</guid><pubDate>Mon, 21 Sep 2026 00:40:00 GMT</pubDate><description>Bitcoin near $81,202, down 0.08% in 24 hours, with Ether at $2,637.57 and Solana at $110.70. Three near-zero closes hiding 24-hour ranges of 1.7% to 3.6% &#8212; and a Bitcoin perpetual contract count that added 1,637 and removed 1,964 inside the same flat session. 21 Sep 2026 brief.</description></item><item><title>How to Set a Stop-Loss on Hyperliquid</title><link>https://crypto.simi.vn/how-to/set-stop-loss-on-hyperliquid</link><guid isPermaLink="true">https://crypto.simi.vn/how-to/set-stop-loss-on-hyperliquid</guid><pubDate>Sun, 20 Sep 2026 10:30:00 GMT</pubDate><description>The trigger is the mark price, a median of three inputs, not the last trade. Left as a market order a stop carries a documented 10% slippage tolerance &#8212; $1,000 on a $10,000 position, 222 times the $4.50 taker fee. Invert the venue&#8217;s own liquidation formula and the stop distance you want becomes a leverage ceiling: 5% needs 16x or less, 10% needs 8x or less, 20% needs 4x or less. Above 8.99x on BTC &#8212; 6.90x on 10x-cap assets &#8212; the slippage band is wider than the entire distance from entry to liquidation. Official docs, read 20 Sep 2026.</description></item>
<item><title>What Is Dollar-Cost Averaging (DCA)?</title><link>https://crypto.simi.vn/glossary/dollar-cost-averaging</link><guid isPermaLink="true">https://crypto.simi.vn/glossary/dollar-cost-averaging</guid><pubDate>Sat, 19 Sep 2026 16:10:00 GMT</pubDate><description>Four $250 buys at 100/80/60/90 give an average cost of 79.56 against a plain price average of 82.50 — that gap is the whole mechanism. Then the same four buys measured again: after one more 10% fall the percentage loss improves from 34.39% to 22.62% while the dollar loss grows from $85.97 to $226.23. DCA lowers the average cost and the percentage; it multiplies the money at risk.</description></item>
<item><title>USDT vs USDC: Which Stablecoin Should You Hold?</title><link>https://crypto.simi.vn/compare/usdt-vs-usdc</link><guid isPermaLink="true">https://crypto.simi.vn/compare/usdt-vs-usdc</guid><pubDate>Sat, 19 Sep 2026 12:30:00 GMT</pubDate><description>USDT is about 59% of stablecoin supply but roughly 74% of on-chain trading volume, so most pairs are quoted in it. USDC is the MiCA-authorised one that European venues kept — and the one that actually broke, falling to $0.8726 in March 2023 when 8% of its reserves sat in a failed bank. Which to hold, decided by where you trade rather than which issuer you trust.</description></item><item><title>Daily Brief — September 19, 2026: Bitcoin rose 6% and the crowd got less long</title><link>https://crypto.simi.vn/market/2026-09-19-daily-brief</link><guid isPermaLink="true">https://crypto.simi.vn/market/2026-09-19-daily-brief</guid><pubDate>Sat, 19 Sep 2026 01:10:00 GMT</pubDate><description>Bitcoin near $81,314, up 6.39% in 24 hours, with Ether at $2,620.40 and Solana at $113.38. Binance Bitcoin perpetual open interest fell 0.3% in coins over the same window and long accounts dropped from 55.4% to 47.4% — while Ether open interest rose 3.2% with funding at its 0.01% baseline. 19 Sep 2026 brief.</description></item>
<item><title>Best crypto app in India: what 50,000 rupees actually buys</title><link>https://crypto.simi.vn/exchanges/best-crypto-app-in-india</link><guid>https://crypto.simi.vn/exchanges/best-crypto-app-in-india</guid><pubDate>Fri, 18 Sep 2026 09:00:00 +0000</pubDate><description>OKX lists India as a restricted location in its own disclosure. On the two venues that do serve India, one 50,000-rupee spot trade arrives as 49,441 after fee, 18% GST and 1% TDS &amp;mdash; and TDS is charged on turnover, not on profit.</description></item>
<item><title>Best Crypto Trading App: Binance vs OKX vs Bybit</title><link>https://crypto.simi.vn/exchanges/best-crypto-trading-app</link><guid>https://crypto.simi.vn/exchanges/best-crypto-trading-app</guid><pubDate>Fri, 18 Sep 2026 09:00:00 +0000</pubDate><description>Three exchange apps measured off their own App Store listings: install size, oldest iOS, release cadence, practice mode and what the app cannot do.</description></item>
<item><title>What Does HYPE Actually Do? Gas, Staking, Fees, Burn</title><link>https://crypto.simi.vn/dex/hype-token-explained</link><guid isPermaLink="true">https://crypto.simi.vn/dex/hype-token-explained</guid><pubDate>Thu, 17 Sep 2026 11:30:00 GMT</pubDate><description>HYPE does four jobs: gas on the HyperEVM, consensus stake, a 5-40% fee discount and the assistance fund that converts fees to HYPE and burns them. Trading needs none of it &#8212; HyperCore orders are gas-free. The smallest staking tier saves $0.44 on a $10,000 taker round trip, which is $4,545,455 of notional before it returns $100, and every step up the ladder costs about ten times more HYPE for the same $0.44 to $0.90 &#8212; so the first 10 HYPE are 6,111 times better value per token than the last 400,000. A free referral code is worth 82% of the smallest tier with nothing to buy, and an HIP-3 perp in growth mode charges 0.0045-0.009%, three to six times less than the Diamond tier and with no HYPE at all. Official docs, read 17 Sep 2026.</description></item>
<item><title>Hyperliquid vs dYdX: which perp DEX costs less?</title><link>https://crypto.simi.vn/compare/hyperliquid-vs-dydx</link><guid isPermaLink="true">https://crypto.simi.vn/compare/hyperliquid-vs-dydx</guid><pubDate>Sun, 13 Sep 2026 11:30:00 GMT</pubDate><description>Hyperliquid charges 0.045% taker and 0.015% maker; dYdX charges 5.0 and 1.0 basis points. Blended, the two cost exactly the same at 50% maker fills &#8212; $6.00 on a $10,000 round trip &#8212; and swap places either side of it. A Hyperliquid staking discount of one third or more removes dYdX's advantage at every ratio. The deeper split is margin: dYdX scales a market's initial margin fraction with the market's total open interest, so an isolated-tier market going from $500,000 to $1,000,000 of open interest turns 20x into 1x and multiplies the margin on an unchanged $10,000 position from $500 to $10,000. BTC and ETH are exempt. Both venues' official documentation, read 13 Sep 2026.</description></item>
<item><title>Daily Brief — September 17, 2026: the leverage came back before the price did</title><link>https://crypto.simi.vn/market/2026-09-17-daily-brief</link><guid isPermaLink="true">https://crypto.simi.vn/market/2026-09-17-daily-brief</guid><pubDate>Thu, 17 Sep 2026 05:20:00 GMT</pubDate><description>Bitcoin near $76,481, up 0.86%, the day after the Fed raised rates for the first time since July 2023. Price is still 2.2% below its 15 September open, but Binance perpetual open interest is 4.8% higher — more leverage on a lower price. 17 Sep 2026 brief.</description></item>
<item><title>Daily Brief — September 13, 2026: the range that went missing</title><link>https://crypto.simi.vn/market/2026-09-13-daily-brief</link><guid isPermaLink="true">https://crypto.simi.vn/market/2026-09-13-daily-brief</guid><pubDate>Sun, 13 Sep 2026 04:10:00 GMT</pubDate><description>Bitcoin near $77,288, down 0.06% over 24 hours inside a 0.58% range — only one completed day in the previous 89 was tighter, against a 2.56% median. Binance perpetual open interest is down 3.3% in two days while funding stayed positive, three days before the FOMC decision. 13 Sep 2026 brief.</description></item>
<item><title>How to Fund a Crypto Account Without Overpaying</title><link>https://crypto.simi.vn/how-to/fund-a-crypto-account</link><guid isPermaLink="true">https://crypto.simi.vn/how-to/fund-a-crypto-account</guid><pubDate>Sat, 12 Sep 2026 12:30:00 GMT</pubDate><description>The payment row sets the price before you pick a coin: on 500 EUR a card costs 10.00 EUR, a SEPA transfer 1.00 EUR and a spot order 0.50 EUR &#8212; twenty times apart for the same coin. Because a flat fee and a percentage cross over, below 50.00 EUR the card genuinely is cheapest. Deposits are free and a USD wire out is 25 USD flat, which is 25% of a 100 USD experiment. Binance published fees, read 12 Sep 2026.</description></item>
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