去掉trim data，修改check_fx回去

web/templates/index.html

@@ -1256,47 +1256,6 @@
         // ======= 趋势筛选(币对) =======
         let trendTable = null;
 
-        // 不在前端截断数据，保留完整历史，避免K线数量限制
-        function trimDataInPlace(payload, maxLen = 2000) {
-            if (!payload || typeof payload !== 'object') return;
-            delete payload.original_kline_data;
-            delete payload.original_macd;
-
-            // 截断大型数组，只保留最新 maxLen 条数据
-            const arrayKeys = [
-                'kline_data', 'element_kline_data', 'sub_sub_kline_data',
-                'bi_list', 'element_bi_list', 'sub_sub_bi_list',
-                'seg_list', 'element_seg_list', 'sub_sub_seg_list',
-                'zs_list', 'element_zs_list', 'sub_sub_zs_list',
-                'uncompleted_bi_list', 'uncompleted_seg_list', 'uncompleted_zs_list',
-                'element_uncompleted_bi_list', 'element_uncompleted_seg_list', 'element_uncompleted_zs_list',
-                'bsp_list', 'element_bsp_list', 'sub_sub_bsp_list',
-                'trade_points', 'element_trade_points'
-            ];
-            for (const key of arrayKeys) {
-                if (Array.isArray(payload[key]) && payload[key].length > maxLen) {
-                    payload[key] = payload[key].slice(-maxLen);
-                }
-            }
-            // 截断 MACD 子数组
-            const macdKeys = ['macd', 'element_macd', 'sub_sub_macd'];
-            for (const mk of macdKeys) {
-                const m = payload[mk];
-                if (m && typeof m === 'object') {
-                    for (const sub of ['macd', 'signal', 'histogram']) {
-                        if (Array.isArray(m[sub]) && m[sub].length > maxLen) {
-                            m[sub] = m[sub].slice(-maxLen);
-                        }
-                    }
-                }
-            }
-            // 截断 ATR 数组
-            for (const ak of ['atr', 'element_atr', 'sub_sub_atr']) {
-                if (Array.isArray(payload[ak]) && payload[ak].length > maxLen) {
-                    payload[ak] = payload[ak].slice(-maxLen);
-                }
-            }
-        }
         let trendDetailTable = null;
         let trendChart = null;
 
@@ -2081,16 +2040,21 @@
             }
             ensureSubSubLteElement();
         });
+        let _lastKlinePeriod = 'main';
         function updateChartDisplay() {
             if (currentData) {
-                // 保存当前的可见逻辑范围
+                // 检测K线周期是否切换
+                const curPeriod = $('#subSubPeriodKline').is(':checked') ? 'subsub' :
+                                  ($('#elementPeriodKline').is(':checked') ? 'element' : 'main');
+                const periodChanged = (curPeriod !== _lastKlinePeriod);
+                _lastKlinePeriod = curPeriod;
+
+                // 保存当前的可见逻辑范围（周期切换时不保留，避免范围越界）
                 let logicalRange = null;
                 let visibleRange = null;
                 
-                if (tvWidget && tvWidget.mainChart) {
-                    // 优先使用逻辑范围，这样在缩放级别上更准确
+                if (!periodChanged && tvWidget && tvWidget.mainChart) {
                     logicalRange = tvWidget.mainChart.timeScale().getVisibleLogicalRange();
-                    // 备用方案，获取实际时间戳范围
                     visibleRange = tvWidget.mainChart.timeScale().getVisibleRange();
                 }
                 
@@ -2279,9 +2243,6 @@
                         return;
                     }
 
-                    // 截断数据以限制内存占用
-                    trimDataInPlace(data, 2000);
-                    
                     // 保存当前数据
                     if (currentData) {
                         // 覆盖前断开旧引用，帮助GC尽快回收