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　　合法

　　用100元购买数字资产后，账户资产显示为100元，但过了一会资产变少的情况：

　　这是因为数字资产的价格是实时变化的，即使您没有进行买卖操作，您持有的数字资产的价值也会随着市场价格波动而变化。

　　用100元购买USDT后，账户资产显示不足100元的情况：

　　在进行资产估值时，系统会先将您持有的数字资产按照平台的交易价格换算成BTC，然后再将BTC按照BTC/USD指数的价格换算成USD或者CNY。因此，账户资产的估值会随着数字资产价格波动而变化，这是正常现象。

　　1、打开欧易交易所app，点击”注册账号”。您可以选择用手机号或邮箱注册。

　　2、进行图片验证，输入收到的验证码，设置密码即可完成注册。在交易前，完成KYC认证即可使用！

　　注意：国内的欧易交易所app用户建议使用邮箱注册。

　　打开欧易首页，点击“C2C买币”。

　　选择“快捷买币”选项。

　　点击需要购买的数字资产。

　　确认选择后，输入需要购买的金额。

　　选择支付方式进行支付。

　　点击“下一步”，确认购买详情预览。

　　点击“获取付款详情”

　　按照商家要求的支付方式进行转账，根据页面展示的金额进行付款。

　　付款成功后，点击“我已支付”。

　　确认已转账，等待商家收到款后放币即可完成交易。

　　进入欧易App的【快捷买币】或【C2C买币】页面。

　　在页面顶部切换至【出售】页面。

　　选择要出售的币种。

　　按照页面提示的步骤操作，等待买家付款。

　　买家付款后，请仔细核实收款账户是否已经收到款项。

　　确认款项到账后，请务必点击【确认收款】，这样才能放币给买家，完成交易。

　　注意事项：

　　卖家务必核实收款账户是否已经收到款项，确认款项到账后再进行放币。系统不会自动放币。收到买家的款项后，请及时点击【确认收款】进行放币。

　　在卖币过程中，请注意安全，避免欺诈风险，确保交易顺利完成。

　　如果发现手机或邮箱被占用可以将手机或邮箱迁移至当前账号。具体参考以下操作：

　　1.以迁移邮箱账号为例:打开OKX APP，登录主账号，点击首页左上角个人中心一[个人资料和设置]一[安全中心]一[邮箱验证]一[修改邮箱地址]。

　　2.按要求输入[新邮箱]、[新邮箱验证码][原邮箱验证码]、[谷歌验证码]一[确定]一[迁移账号]。

　　3. After confirming the relevant information, click [Start] – [Correct] – [Next Step], check the account closure notice information, click [Close Account] – [Yes, confirm] – [Complete], and successfully migrate the account.

　　温馨提示

　　1. The account you log in to is the main account, and the duplicated account with the migrated mobile phone number or email address is the duplicate account. After migration, the duplicate account will be closed. To prevent asset loss, please transfer all assets from the migrated account before closing the account.

　　2. Only unverified accounts can be migrated, and verified accounts cannot be migrated; after migration, the invitation relationship and assets of duplicate accounts will not be transferred; in addition, mobile phone numbers and email addresses cannot be migrated multiple times.

　　General Provisions: Aimed at standardizing the behavior of digital asset borrowing, leverage, and contract trading, maintaining market order, protecting the legitimate rights and interests of users, and ensuring fairness, openness, justice, and transparency.

　　Contract downline standards: The downline standards are formulated based on the problems of the token issuer and the platform, including systematic risk issues and technical security issues.

　　Leverage downline standards: The downline standards are formulated based on the problems of the token issuer and the platform, including systematic risk issues and technical security issues.

　　Dealing with the problem of contract downline: including delivery methods, handling of open positions, margin call losses, clearing fees, adjusting contract parameters, user notification, fund transfer, and other issues.

　　Dealing with the problem of leverage downline: including adjusting leverage parameters, suspending borrowing time, handling of open positions, downline time, forced liquidation fees, user notification, bill inquiry, and other issues.
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　　Terms of Use: Users must agree to the relevant agreements to participate in related business, including borrowing currency agency, risk assessment, and other content.

　　Appendix: This section stipulates the matters such as the formulation, implementation, modification, interpretation, legal application, and the relationship with other agreements and rules of this standard.

　　The holding position has not been settled:

　　Long position profit calculation formula: Long position profit = Face value * Opening number of contracts / Opening price – Face value * Opening number of contracts / Closing price

　　Short position profit calculation formula: Short position profit = Face value * Opening number of contracts / Closing price – Face value * Opening number of contracts / Opening price

　　The holding position after settlement:

　　The profit calculation approach is the sum of pre-settlement profit and post-settlement profit

　　Long position profit calculation formula: Long position profit = (Contract value / Average opening price – Contract value / Average closing price) * Number of contracts
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　　Short position profit calculation formula: Short position profit = (Contract value / Average opening price – Contract value / Average closing price) * Number of contracts

　　After the holding position is settled, then add the position:

　　It is necessary to calculate the margin formula first, and then calculate the average opening price

　　The profit calculation formula is: The profit displayed on the bill page = (Contract value / Settlement base price – Contract value / Average closing price) * Number of contracts

　　The actual profit calculation formula for holding positions is: Actual profit = (Contract value / Average opening price – Contract value / Average closing price) * Number of contracts