diff --git a/src/main/java/ru/ulstu/controller/IndexController.java b/src/main/java/ru/ulstu/controller/IndexController.java
index 11a630a..6a00753 100644
--- a/src/main/java/ru/ulstu/controller/IndexController.java
+++ b/src/main/java/ru/ulstu/controller/IndexController.java
@@ -54,53 +54,60 @@ public class IndexController {
         if (chartForm.getTimeSeriesMeta() != null
                 && chartForm.getTimeSeriesMeta().getKey() != null
                 && !chartForm.getTimeSeriesMeta().getKey().isEmpty()) {
-            addChartToModel(dbService.getTimeSeries(chartForm.getSet(), chartForm.getTimeSeriesMeta().getKey()), null, model);
+            addChartToModel(dbService.getTimeSeries(chartForm.getSet(), chartForm.getTimeSeriesMeta().getKey()),
+                    null,
+                    chartForm.isNeedForecast(),
+                    model);
         }
         return "index";
     }
 
-    private void addChartToModel(TimeSeries timeSeries, String method, Model model) throws ExecutionException, InterruptedException, InvocationTargetException, NoSuchMethodException, InstantiationException, IllegalAccessException, ModelingException {
-        int countForecastPoints = timeSeries.getLength() > 20 ? 10 : timeSeries.getLength() / 3;
-        TimeSeries timeSeriesModel;
-        ModelingResult modelingResult;
-        if (method == null) {
-            timeSeriesModel = timeSeriesService.smoothTimeSeries(timeSeries).getTimeSeries();
-            modelingResult = timeSeriesService.getForecast(timeSeries, countForecastPoints);
-        } else {
-            timeSeriesModel = timeSeriesService.smoothTimeSeries(timeSeries, method).getTimeSeries();
-            modelingResult = timeSeriesService.getForecast(timeSeries, method, countForecastPoints);
-        }
-        TimeSeries forecast = modelingResult.getTimeSeries();
-        TimeSeries testForecast = modelingResult.getTestForecast();
-        model.addAttribute("dates", getDatesForChart(timeSeries, forecast));
-        model.addAttribute("timeSeries", timeSeries.getValues().stream().map(TimeSeriesValue::getValue).toArray());
-        // если временной ряд был сжат моделью, то для графика нужно вставить пустые значения
-        TimeSeries modelWithSkips = new TimeSeries(timeSeriesModel.getKey());
-        int j = 0;
-        for (int i = 0; i < timeSeries.getLength(); i++) {
-            if (timeSeries.getValue(i).getDate().equals(timeSeriesModel.getValue(j).getDate())) {
-                modelWithSkips.addValue(timeSeriesModel.getValue(j));
-                j++;
+    private void addChartToModel(TimeSeries timeSeries, String method, boolean needForecast, Model model) throws ExecutionException, InterruptedException, InvocationTargetException, NoSuchMethodException, InstantiationException, IllegalAccessException, ModelingException {
+        if (needForecast) {
+            int countForecastPoints = timeSeries.getLength() > 20 ? 10 : timeSeries.getLength() / 3;
+            TimeSeries timeSeriesModel;
+            ModelingResult modelingResult;
+            if (method == null) {
+                timeSeriesModel = timeSeriesService.smoothTimeSeries(timeSeries).getTimeSeries();
+                modelingResult = timeSeriesService.getForecast(timeSeries, countForecastPoints);
             } else {
-                modelWithSkips.addValue(new TimeSeriesValue((Double) null));
+                timeSeriesModel = timeSeriesService.smoothTimeSeries(timeSeries, method).getTimeSeries();
+                modelingResult = timeSeriesService.getForecast(timeSeries, method, countForecastPoints);
             }
+            TimeSeries forecast = modelingResult.getTimeSeries();
+            TimeSeries testForecast = modelingResult.getTestForecast();
+            // если временной ряд был сжат моделью, то для графика нужно вставить пустые значения
+            TimeSeries modelWithSkips = new TimeSeries(timeSeriesModel.getKey());
+            int j = 0;
+            for (int i = 0; i < timeSeries.getLength(); i++) {
+                if (timeSeries.getValue(i).getDate().equals(timeSeriesModel.getValue(j).getDate())) {
+                    modelWithSkips.addValue(timeSeriesModel.getValue(j));
+                    j++;
+                } else {
+                    modelWithSkips.addValue(new TimeSeriesValue((Double) null));
+                }
+            }
+            model.addAttribute("model", modelWithSkips.getValues().stream().map(TimeSeriesValue::getValue).toArray());
+            timeSeries.getValues().remove(timeSeries.getValues().size() - 1);
+
+            List<Double> forecastValues = timeSeries.getValues().stream().map(v -> (Double) null).collect(Collectors.toList());
+            forecastValues.addAll(forecast.getValues().stream().map(TimeSeriesValue::getValue).collect(Collectors.toList()));
+            model.addAttribute("forecast", forecastValues.toArray());
+
+            List<Double> testForecastValues = timeSeries.getValues()
+                    .stream()
+                    .skip(countForecastPoints)
+                    .map(v -> (Double) null)
+                    .collect(Collectors.toList());
+            testForecastValues.addAll(testForecast.getValues().stream().map(TimeSeriesValue::getValue).collect(Collectors.toList()));
+            model.addAttribute("testForecast", testForecastValues.toArray());
+            model.addAttribute("forecastDescription", modelingResult);
+            model.addAttribute("statistic", statisticService.getStatistic(timeSeries));
+            model.addAttribute("dates", getDatesForChart(timeSeries, forecast));
+        } else {
+            model.addAttribute("dates", getDatesForChart(timeSeries, new TimeSeries()));
         }
-        model.addAttribute("model", modelWithSkips.getValues().stream().map(TimeSeriesValue::getValue).toArray());
-        timeSeries.getValues().remove(timeSeries.getValues().size() - 1);
-
-        List<Double> forecastValues = timeSeries.getValues().stream().map(v -> (Double) null).collect(Collectors.toList());
-        forecastValues.addAll(forecast.getValues().stream().map(TimeSeriesValue::getValue).collect(Collectors.toList()));
-        model.addAttribute("forecast", forecastValues.toArray());
-
-        List<Double> testForecastValues = timeSeries.getValues()
-                .stream()
-                .skip(countForecastPoints)
-                .map(v -> (Double) null)
-                .collect(Collectors.toList());
-        testForecastValues.addAll(testForecast.getValues().stream().map(TimeSeriesValue::getValue).collect(Collectors.toList()));
-        model.addAttribute("testForecast", testForecastValues.toArray());
-        model.addAttribute("forecastDescription", modelingResult);
-        model.addAttribute("statistic", statisticService.getStatistic(timeSeries));
+        model.addAttribute("timeSeries", timeSeries.getValues().stream().map(TimeSeriesValue::getValue).toArray());
     }
 
     private List<String> getDatesForChart(TimeSeries timeSeries, TimeSeries forecast) {
@@ -132,7 +139,10 @@ public class IndexController {
                 && !chartForm.getTimeSeriesMeta().getKey().isEmpty()
                 && chartForm.getMethodClassName() != null
                 && !chartForm.getMethodClassName().equals("")) {
-            addChartToModel(dbService.getTimeSeries(chartForm.getSet(), chartForm.getTimeSeriesMeta().getKey()), chartForm.getMethodClassName(), model);
+            addChartToModel(dbService.getTimeSeries(chartForm.getSet(), chartForm.getTimeSeriesMeta().getKey()),
+                    chartForm.getMethodClassName(),
+                    chartForm.isNeedForecast(),
+                    model);
         }
         return "method";
     }
diff --git a/src/main/java/ru/ulstu/datamodel/ChartForm.java b/src/main/java/ru/ulstu/datamodel/ChartForm.java
index eeeed6f..11956d4 100644
--- a/src/main/java/ru/ulstu/datamodel/ChartForm.java
+++ b/src/main/java/ru/ulstu/datamodel/ChartForm.java
@@ -8,6 +8,8 @@ public class ChartForm {
     private TimeSeriesMeta timeSeriesMeta;
     private String methodClassName = null;
 
+    private boolean needForecast;
+
     public TimeSeriesSet getSet() {
         return set;
     }
@@ -31,4 +33,12 @@ public class ChartForm {
     public void setMethodClassName(String methodClassName) {
         this.methodClassName = methodClassName;
     }
+
+    public boolean isNeedForecast() {
+        return needForecast;
+    }
+
+    public void setNeedForecast(boolean needForecast) {
+        this.needForecast = needForecast;
+    }
 }
diff --git a/src/main/resources/templates/index.html b/src/main/resources/templates/index.html
index 5f5fae8..ce192a0 100644
--- a/src/main/resources/templates/index.html
+++ b/src/main/resources/templates/index.html
@@ -123,7 +123,10 @@
                     $('#select-ts').val([[*{timeSeriesMeta.key}]]);
                     $('#select-ts').selectpicker('refresh');
                 </script>
-
+                <input id="need-forecast" type="hidden" th:field="*{needForecast}">
+                <button type="button" class="btn btn-primary" onclick="$('#need-forecast').val(true); form.submit();">
+                    Построить прогноз
+                </button>
                 <h5 th:if="${forecastDescription != null && forecastDescription.timeSeriesMethod != null}">
                     Результаты моделирования:
                 </h5>
diff --git a/src/main/resources/templates/method.html b/src/main/resources/templates/method.html
index bdf89a4..244bc9a 100644
--- a/src/main/resources/templates/method.html
+++ b/src/main/resources/templates/method.html
@@ -120,7 +120,7 @@
 
                 <select id="select-ts" class="selectpicker form-group" data-live-search="true"
                         th:field="*{timeSeriesMeta}"
-                        data-width="90%" onchange="form.submit();">
+                        data-width="90%" onchange="$('#need-forecast').val(false); form.submit();">
                     <option value="">Временной ряд</option>
                     <option th:each="ts : ${listTimeSeries}"
                             th:value="${ts.key}"
@@ -135,7 +135,7 @@
 
                 <select id="select-method" class="selectpicker form-group" data-live-search="true"
                         th:field="*{methodClassName}"
-                        data-width="90%" onchange="form.submit();">
+                        data-width="90%" onchange="$('#need-forecast').val(false); form.submit();">
                     <option value="">Метод прогнозирования</option>
                     <option th:each="method : ${methods}"
                             th:value="${method.key}"
@@ -148,7 +148,10 @@
 
 
                 </script>
-
+                <input id="need-forecast" type="hidden" th:field="*{needForecast}">
+                <button type="button" class="btn btn-primary" onclick="$('#need-forecast').val(true); form.submit();">
+                    Построить прогноз
+                </button>
                 <div th:if="${forecastDescription != null && forecastDescription.timeSeriesMethod != null}">
                     <p> Метод прогнозирования: <span th:text="${forecastDescription.timeSeriesMethod}"> </span>
                     <p> Оценка: <span th:text="${forecastDescription.score.value}"> </span>